I would be quite happy to be wrong about my 'prediction', but I see that technologies such as:
> 4 core CPUs,
> 2 SLI GPUs with some being used for parallel processing, rather than graphics using things like NVIDIA's CUDA,
the Ageia PhysX chip,
and even more advanced cooling (perhaps involving circulating liquids).
Will not fall in value fast enough to prevent the middle of the PC market just buying one of the next-gen consoles instead. I simply don't think that many PC developers have realized that we have entered a major recession, that after the October 22 launch of Windows 7 the majority will be able to justify the expense of 'further upgrades' to their spouses/girlfriends. This time next year the core market of bleeding-edge gamers who are rich enough to spend any amount of money to 'have the latest' will start to shrink consistently month by month and, worryingly for the publishers, none of them will be buying multiple copies of their game - if they paid for it at all.
This will compel formerly PC only publishers to produce games for all platforms, probably using middleware tools such as CryEngine 3 with which the work done on 'the game' is independent of the target platform - each architecture having a differently optimized version of the engine that takes advantage of that platform's idiosyncrasies.
As a gap will have opened up in the PC community, between super-expensive 'bleeding-edge' and affordable, yet under-exploited 'mid-range', many PC gamers will reconsider the continued expense of their hobby and buy one of the subsidized next-gen consoles instead - and by this I mean the PS4 or Xbox 1080. They won't be missing out on any games that are PC-only and the new consoles may well have monitor outputs and support keyboard, mouse, joysticks and yokes (for all the Flight Simulator buffs out there).