The HD remasters series should do pretty well on the Vita's small screen and Solid Snake is making a good impression up-rezzed. Still not sure why the original game isn't in the pack, but as its on PSN, and the Vita will one day be able to play PS One games, we can dream. Peace Walker is also absent, but I guess that's a PSP download in the making.
Anyway, VG24/7 has a bunch of pretty screens to check out (if you like gray, and stairs). They show off some of the item selection features. The game will also come with the MSX original Metal Gear 1 and 2 titles.