With Oculus Rift-like displays, you can have very very big 2D "screens", and very many 2D "screens", and also 3D Abax/"Sand Tables" and Environments.
And that's why I'm very disappointed with Microsoft, Microsoft Research etc, for crap like Windows 8.
High powered personal computers with such screens and a suitable UI could let you do a lot more, quicker than what's possible now (and also check facebook/slashdot in a fancier way
While it's true there isn't much of a market for such devices yet, but the OS and UI has to be in a position to support such devices first. You need the infra, APIs, frameworks so that developers ("Developers! Developers! Developers!") can start building stuff.
Even if it's merely an announcement of direction with no actual tangibles yet, it'll make me more hopeful and excited. The roadmap/direction they've been announcing has been disappointing for all the supposed creative geniuses they are supposedly paying. Who gets excited about Microsoft turning their desktop computer into a more powerful tablet?
Someone will eventually do it. I doubt the present Desktop Linux bunch will or can, nowadays it seems their idea of innovation is to make a UI that's worse than whatever Microsoft shits out. They're so bad that I sometimes wonder if they're being paid to sabotage Desktop Linux.
Maybe Apple might? If Google or Apple succeed in making a decent virtual savant/telepathy/telekinesis wearable device or make a better general purpose UI for Oculus Rift stuff I'd say it's genuinely "Insanely Great".