I could only hope theyd make it DX11 friendly.
http://www4.picturepush.com/photo/a/...mg/2414527.jpg
Earlly speculation was that SE would have different graphical controls for PS3 and PC, so they whole PS2 limitations thing wouldnt hold them back again.
A number of MMOs have come out with graphical upgrades over the course of the years. During Alpha only certain specs will work, but I bet when retail comes out, 10 year old PCs will be able to run the game too as SE hasnt enable any graphical control yet.
I could only hope SE will benefit the people who can run DX11+. There really is no such thing as "requirements" in PC terms anymoe, sure some apps/games will refuse to run on older specs, but for the most part, my 10 year old laptop can run everything out on the market, albeit very badly.
Anything you go out and buy now will work, anything you have now will work too, but theres no reason to say SE shouldnt progress their graphics just because someones situation cant make the best of it. By the time XIV comes out there will be a new GPU series, and SE should allow to have that series run better than what it's using currently.
Obviously it's tons of work to keep up with the fast growing computer world, theyd have to put out a new graphical and system update every half a year at minimum. But thats no reason why they shouldnt plan for the future; IE using DX11 wireframe as well as 10, and then having the users specs determine the quality of the graphical output.
XI Wiki



