Oh boy, 3 times the updates! 3 times the day-0 exploits! This will be fun.

Aretha Franklin knows what we need.

I imagine that some would tend towards isolationism, while others would tend toward exhibitionism.

Who's a cheater, when everyone has their own rules? Therein, I think, lies the real problem.

And banning is so easy, a child (with the right equipment) can do it. But that's usually considered against the rules (unless you wear a badge).

A big problem with that world is that it takes a lot of drudgery just to maintain your stats, so there's little time left to actually do fun stuff.

Transplant? That's old-school tech. Needs nasty immune-suppressing drugs. The latest thing is to print a new hand using your own stem cells.

Okay, maybe a few years off yet. But I expect to see it in my lifetime.

Hmm, supper without super just leaves "p". Yeah, I'd agree.

Mod parent up. Note that this is using the camera on the Wiimote to sense the position (not the accelerometer). There are multiple advantages to this:
1) It's operating much faster than 60hz (much less latency than webcams).
2) It's already detecting the position of the brightest points (no additional image processing needed).
3) Since the Wiimote is wireless, you can easily position it anywhere.
4) Since it is Bluetooth, you can interface it easily with many devices.
5) You're not making the conductor hold the Wiimote.

All you'd need to do is to paint or cover the baton tip with IR retroreflective material, and perhaps add some IR LEDs around the Wiimote sensor.
This should make the baton tip stand out. You may still get several reflections, but software should be able to sort out which is the right one.
Alternately, you can use a baton with an IR LED in the tip, if the conductor is willing.

As far as output, I've got my own idea: the basic theme is to use 4 tactile devices (such as piezos) that indicate when the baton hits the respective quadrant (up/down/left/right, with some quadrants missing according to the time, and some modifications necessary for less common signatures). For seated musicians, you can use a chair pad. For standing ones, a floor pad might work better. Or you can also use various kinds of garments (glove, arm strap, belly strap, or any combination). However you wish to apply the 4 tactile devices, the system should be able to work with it. It may make sense to rotate the up/down/left/right "compass" 45 degrees either way for better sensitivity (for the chair or floor pads, for instance).

With enough viewing angles, you get focal depth. That's what focus is, after all: bending the rays from the desired angles to meet your retinas.
The question, of course, is "what is enough?" It's actually more about the density (how many differently-angled rays are hitting your pupils?) than the absolute number.

Would become quite a boring game, if everyone had the ability.

Often times, when I've lost track of something, and I really want to find it, I wished I had the ability to perceive the exact location of the object in question.

Oh, and of course, I'm also hoping to see self-driving cars become popular soon enough (to specifically address the first option).

Wearing a helmet while walking outside would undoubtedly save lives. Should it be mandatory?

(I get the jist of your point; I'm just responding to what you literally said.)

You are bypassing the issue by applying a specific definition to "texting".

The part of texting that is dangerous is obviously the part where you are looking at the phone and pushing buttons, not the part where the phone itself actually sends the message.

Of course, this brings forth the question about other tasks that involve looking at the phone and pushing buttons, which gets to the heart of the issue: doing anything that excessively distracts the driver's attention from the task of driving is a bad idea; should such tasks be banned?

This will cease to be a problem.

Of course, then we'll have to deal with the problem of everyone babbling to their electronic devices constantly
(we've already got that now; it seems to be less of a safety issue and more of an annoyance issue).

The use of subvocalization (http://en.wikipedia.org/wiki/Subvocal_recognition) might be an interesting next step,
though it will be interesting to see how many people just don't get it and keep talking out loud.

While direct neural input has its supporters, I'd still prefer methods that don't require any surgery.

I'm surprised this option wasn't listed. This is the procrastinator's best position, since even if you don't file by the "deadline", as long as you are owed a refund, the government doesn't care (since they get to keep your money, obviously).