It's not HD Graphics 4000. It's just HD Graphics, with no numbering. It only has 6 execution units (compared to 16 on HD 4000) and is clocked much lower.
Actually, per the datasheet[1] it has 4 EUs. I could not find any information about clocking the core, but I didn't search the entire 5100(!) page document.
I thought it was the same stuff they put in the Celerons and Pentiums, just clocked lower, but if only has 4 EUs, that's even worse.
I can see this being big with the media-art crowd for installations if it has any sort of real graphics oomph. From what I've heard the pi is just barely capable of hd video, anyone able to divine these tech specs into a comparison with the pi's graphics capability?
I think memory might be your bottleneck with newer games. Apparently Diablo III will tolerate having just 1GB, but only on XP.
Most likely. Skyrim was playable on the HD3000s, in my experience, so...
As I said above, this thing is much slower than the HD 3000 or 4000.