Given that every other mainline Final Fantasy game is readily available on relatively up-to-date machines (PS3, Xbox 360, handhelds, PC, mobile) but FFXII - except through legally dubious means - it would be a shame if FFXII is the only one left untouched and PS2 only.
Type-0 HD seems to be a precedent at the moment. If they're comfortable with remastering a PSP game for current gen machines, there is no reason why FFXII can't follow suit.
Now if only SE was comfortable reviving the Fortress project again in addition...