Not going to be practical for most people or even most business men for a long time.
It makes what Google Glass was doing bigger (which is kinda flunking at the moment...), but it'll be a very long time before this stuff is widely used all over the place. And of course one of the biggest things they need to do is shrink to a point where people don't think it looks ridiculous.
I mean it's cool and all, but the practicality isn't there. Plus, even with a head/motion tracking display like this, I think a mouse would still be more precise in the end than even finger pointing, but I think that would be a fairly simple thing to implement into it.
Anyways, just finished watching the entire event. Of course most of my interest was the gaming part of it (and I have Windows 10, but am hoping that the new build this or next week fixes the crashing of some games in Steam that the November build has, and which the October build did not have an issue with.) I'm still not planning on getting and XBOX, though... I still envy the frequent updates that it gets compared to what Sony is doing (and I hope they can have a comeback), but I'm still mainly a Steam user. If Microsoft comes out with PC game in-home streaming to match Steam, I'm hoping Steam can soon match the ability to save recordings like (the buggy as hell atm) Nvidia Shadowplay, or Xbox's recording saving and Sony's as well (which... they rrreally need to streamline...). I'll probably still be sticking with Steam here, but the main thing is that hopefully they're making a big push to make sure the Xbox app is not as much of a pain in the ass as GFWL was. And hopefully they'll even play nicely together as well.
Oh and btw guys, not only is Windows 10 free to Windows 8/8.1 users (like what was expected)... but they even made it free for 7 users. Damn...
(For the first year that is.)