I agree on that, the release of GTAIV was awful for PC, sketchy badly drawn shadows, stuttering, >>> NO SUPPORT AA AT ALL <<<< It looked awful until hacks came out and then a shadow patch way over a year or more later, its only due to hacks I think we got AA support even now.
As always this will be console first so its interesting but then a little annoying knowing whats to come visually. The way they would win back from the last is full optimisation for PC on release (AA support for god sake & proper shadows) .. and they released to PC not long after console, which I highly doubt will happen anyway.
I am very interested to see the trailer to see how they have upped the graphics, recent hacks with graphics mods for IV look stunning and photo realistic, hope they have learned from the past.
Although off topic while this takes a long time to land on PC (which is why it doesn't amaze me as news) I really wish they would drop Red Dead Redemption to PC instead of LA Noire 