I've done a number of hacks to get it to work, but using my Android phone as a Bluetooth keyboard is the killer app. Google keyboard swype plus the better Google voice recognition makes it usable. Also, I cut off the fabric of a backup light shield, so you can use it with peripheral vision. That's pretty decent for chores.
Give it a few weeks for bored people to start making apps, figure out how to limit YouTube on this thing so you're not turning into a wire head. I try to watch my 80" TV now, and it just feels too small and restricted.
This is just the news being news. If you're savy, and if you have a MBP, and especially if you're a developer, and especially if you have the money, it's legit. It's only going to get better. My thought was, better spend the money now and experience a revolution than wait a year for it to be even better, but too afraid to drop that amount of money when the second one is about to come out.