Despite spending so much time talking about it at their conference, we really don't know much about SmartGlass, other than it requires an up-to-date tablet.
I think it's cool that they're trying to do combine all their different products (Windows 8, tablet apps, Windows Phone, Xbox) into a sort of massive seamless service, but it's kinda worthless to most people.... right? And yeah, the whole "let's copy the Wii U but with a super expensive tablet instead of a probably cheap controller" part was rather laughable.