It is an issue because it wouldn't look nearly as good as other PC games that will be out in mid/late 2006. Even San Andreas was pretty far behind other games when it was released for PC (graphically). Sure you can run it at higher resolutions with AA and they'll probably put in some high-res textures, but it would still end up looking like GTAIII, a 3 year old game. The only way I see it coming out for PC is if they add some SA-like effects (dynamic reflections, lighting, etc).