It feels like it! ( driving to easy/boring). I played gta 5 on ps3 for a coupleo f hours and I really really missed the gta4 driving. Gta 4 was rubbish for bikes but driving cars was nice there.
Just pre-ordered my copy, GTA and Civ games are the only 2 games I trust to pre-order.
I want the map/poster so stuck with the retail version, but I want it on steam

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Is it steamworks, does anyone know ?
Why do people keep saying this ? It simply needs both a decent cpu and a decent GPU, it runs FAR nicer than on consoles, imho it's barely playable on ps3/x360 due to the frame drops.
I have a dated spec ( gtx570, first gen i7), and I play GTA 4 just fine at 2560x1440 ( I play it supersampled to get better AA, FXAA doesn't cut it imo). Sure it's not 60 fps, but much higher FPS than on the old crappy consoles while looking much better.
Framerate is off the roof if you play it at ''console'' settings ( 1280x720, traffic at 16 or 17 was it, all the other things on medium, draw and detail distance much lower, etc...).