Honestly, I know it's probably an unpopular opinion around here because it's fun to hate on Microsoft... but having now owned a first-gen Surface Pro for about 2 months I have to say that it's the best tablet I've ever owned. I picked it up on the clearance when the Gen 2 was released because despite some misgivings I really did appreciate the concept.
It's not a great laptop, and it's a rather bulky and heavy tablet but the ability to have a REAL computer that I can carry around easily is incredibly valuable to me. That and being able to use WiFi on planes any more means that I can be in touch and even work in a coach seat while flying across the country. Given I've just completed business trip #4 for the year so far this has become very useful to me.
Despite its limitations, it has surprisingly managed to supplant any number of laptops or tablets I have had at home for just about everything except for very niche uses. It's really fast for just basic web surfing when kicked back on the couch, the stylus is awesome for writing a few hand-written notes in OneNote and having my Type keyboard close at hand means I can plop down on my dining room table and do everything from write a quick email to fire up MobaXterm and get some real work done on the Linux systems I have at home and at my virtual hosting service. As a general-purpose computer it has become a better form factor and a better system than anything else I have at home. My iPad is gathering dust in a drawer due to lack of really good productivity apps or SSH apps, my Macbook Pro sits around mostly waiting for me to feel like firing up a game on Steam or to work in my image library (the big hard drive helps, here!) and my Linux laptop is... well... mostly gathering dust next to the iPad. I have a smattering of Android tablets including a Nexus 7 that I haven't charged in months.
I know this is anecdotal and the Surface Pro isn't really for everyone. For my needs though it's absolutely perfect. Since I moved to a smaller home a year ago (by choice, a condo) I no longer have a study or even a desk so a desktop PC is out and a laptop has to be used on my dining room table or (uncomfortably) on the couch. My Surface Pro I can hold like a tablet if I see fit or plonk down on the table at a moment's notice. This works for me, and as well as the aforementioned coach seat it's also awesome when I travel so I can bring it to breakfast at hotels with me and check email/Slashdot/etc. while I eat and drink coffee.
And a quick snippet of advice for anyone with a 1G Surface Pro... if you want to significantly increase your battery life you can set the maximum CPU on battery to ~60% in the power management settings, then you get at least 30-40% more battery life with no noticeable decrease in performance unless you're doing something really heavy duty. Since I mostly just do web surfing and email on battery and more intensive stuff (like work) on the power adapter this works really well.
Oh and we have looked at other tablet/convertible type laptops at work recently and are probably going to standardize on the Lenovo Yoga as our corporate standard. However, in terms of sheer build quality I still feel my Surface Pro has the Yoga beat hands down.