Super-Mega-Maximal - except that they all pretty much suck. Badly.
Lets see here, only the HP Envy have dedicated graphics. More than half the rest are Intel 3000 - not the "it might be ok, maybe, at 10 FPS or so..." Intel 4000. No no no, Intel 3000. Super mega what now? The rest are Intel 4000 - good luck, have fun with that 10 FPS.
Ok, back to those HP Envy that might maybe possibly come close to fitting the bill of Ultrabook, even if not mega-maxi-whatever. 1366 x 768 TN screens, sad little 1.8 I5's, 4 gigs ram (you'll have to upgrade to 8 gigs), crawling 5400 rpm HD's, and 4 (FOUR! are you kidding me?!) cell batteries. So good luck with your 30 minutes use time. That's not intensive use, no no. If you say might actually want to use those graphics for something? Less. Super ultra mega nothing. The best of this lot is badly sub-par.