Typical PC-Gamer crap if you ask me. It's not like it's the first time they've posted drivel - they manage to do it every month and charge people £5 for the priviledge of reading it!
Crysis isn't really *that* special - it's been overhyped and coded in a way so that it runs poorly on new graphics cards, probably so you'll think the graphics are too advanced for today's cards.
I think the word megatexture is a bit misleading... When I read the title it sounded like super-high-res textures (or something), but reading the article it actually seems to be about preventing textures from looking like they've been tiled. And they don't in the screenshot.