12.10 in that video will squish your fears, normal desktop is still there.
Quite a few games work through Wine and Wine is getting better all the time so being able to play most games on Linux may not be too far away.
@anyone who has watched the vid, did you notice how he was talking about tablets and touch screens all the time?
So what if this os was designed for a touchscreen?.. It still works with kb and mouse doesn't it?... Anyway i'm sure in the not so distant future touchscreens will become a 'must have' like 3D is at the mo.