Quote: "Well, this is nice, but what if we have already bought a new card..."
You will probably still be able to buy the PhysX hardware as a separate card if you wanted to.
Quote: "I remember when my state-of-the-art 486 DX2 66 with Maths co-processor was made defunct by the Pentium"
I think I still have mine in the loft. The DX2 chips doubled the clock so the mainboard actually had to be set to 33Mhz. The 486 DX 50 running at a proper 50Mhz was the 'money' processor. Ooooh baby, that could fly but sadly I couldn't afford one of those
Chart data provided with kind permission from
ELSPA