Caps Lock: Used for key-activated voice communication;
SysRq: Tied to PRTSC, if it ain't broken, don't fix it;
Scroll Lock: X-Fire uses it by default, and it's a great key to use when you need to bind a menu or overlay to something out of the way;
Pause/Break: I use the command prompt and command-line programs a lot. This key is the coolest thing ever.
Windows Key: Win+D all day long, Win+E very often, Win+R like it's a candy dispenser;
Menu Key: Incredibly useful when you can only use one hand to control your computer (especially if it happens to be your keyboard hand)
Function Keys: F1 for documentation, F2 to change names, F3 to pause, Alt+F4 for magic, F5 to refresh slashdot every 3 seconds, F6 to access the URL bar, F 7 when you're too lazy to use your mouse (or can only use your keyboard hand), FN+F8 to toggle wireless on my laptop, F9 to start recording with fraps, F10 to stop, F11 to take a screenshot with fraps, F12 is useful in a handful of apps;

So yeah, even if you're not using these keys yourself, they're very useful to anyone who actually uses their computers for more than browsing facebook.
Start coding anything with more than a few input commands and you'll actually be wanting extra keys :)

This will hardly matter when the entire population is upgraded, as we won't even have to fly anymore.
This policy will also help in containing any resistance, as they will not be able to escape in an airplane, ensuring a faster upgrade process for the whole world.

So it's worse?

I shrunk the proton. The kids are fine, though.

Have him write mod scripts for game servers. Worked for me. Counter-Strike is probably a good starting point.