How much of a difference do you think another 48 shaders and a clock speed bump will give it ?
How much of a difference was there between the 260 and the 260 216core card, it was fairly minimal as I recall, 5% or so.
I reckon they will release a fully unlocked gf104 with a clock speed bump. The 460 needs about a 25% performance boost to match a 5870, will it get that from the extra shaders and clock speed increase ? Who knows, could be 15%, 20%, 25%, 30%. It will definitely bring it close.
How much will it cost ? Probably $300. I think the big thing nvidia wants to do with them is release a dual-gpu card so they can reclaim the flagship, they've been without it for an entire year now, that's a while for nvidia to have not had the fastest video card, longest I can remember.
Either way, 460 is probably not the future for them, as has been said earlier, it had to have been in the pipe for development alongside the gf100, to release at the mid-range.
I'm interested to see if going forward they continue with the trimmed down style of the gf104 for their flagships, or refine on the gf100 with all its additional features and continue to offer a chip with those abilities to the consumer market. I think it may be the latter with all the talk they give to gpu compute and what it can offer.