I can, however, say what I THINK will happen. It looks as though a major factor in determining whether we do actually get to see PVRSG on a PC is not the success or failure of Dreamcast (that isn't really in doubt) but the time lag before the PC board companies get their allotment of chipsets. By all accounts and even having seen the Dreamcast in action, the PVRSG PC based product might not even hold its own - not because it isn't great technology today (it's top-draw) but because by then the window might be slammed shut by the market.
Call it what you want but in very simple terms NEC/VideoLogic did what most chipset manufacturers would have done by selling out to Sega first and making a whole packet of dough. They also conveniently avoided the tough PC accelerated performance competition by cornerning the market (well there's ProjectX) in the technologically weak console arena. Had 3Dfx gotten the Dural contract with Sega last year, then would they have acted any differently? I think they would have taken the cases of greenbacks and run too. But whether that means they would ultimately win when the chipset wars is another question. Meanwhile, it looks as though Sega are taking on the might of the PC's gaming superiority and dominance and simply issuing a challenge. But should the PC 3D accelerator industry respond early next year, then Sega's 'loss' (3Dfx) might turn out to be the PC owner's gain. For example, the next in the long line of the Voodoo Banshee family should surface and it would be safe to assume that it 'might' harbor two TMUs. And by that stage the PVRSG just might not cut it anymore being up against a whole host of next-gen 2D/3D chipsets and as a result have no place on a real gamer's home PC. By then the PVRSG's 120 million pixels per second fill rate will possibly look rather ordinary, thus begging the question of whether or not the likes of Creative and Diamond will go ahead and squabble over chipset allocations.
After Tom and I saw NEC/VideoLogic back at CeBIT '98, we did indeed go on the record as saying we were impressed by the technology. But that was then and this is now. PowerVR seems to be some way off on the PC and instead the Voodoo Banshee, G200, Savage 3D and TNT are all set to fight it out in 'good' Christmas spirit. And with PVRSGs original mid-summer release now being slated back to what is widely rumored to be early 1999, the battle of the 3D cards may have already been won and/or lost- at least for this generation of chipsets. Yes, NEC/VideoLogic look to have changed the focus of their marketing of PVRSG by turning to the Dreamcast's launch in Japan in November pushing back the first PC based product, possibly to Q1 '99.
This is really about market strategy. The original 3Dfx strategy was to get into the arcade market first. Consumer was supposed to be the second phase. NEC seems to think that the way to the market's heart is through its console. Everybody wants to prevail in all three.