> 2. Even the stuff they could be used for, they can't, because not all 
> features use the same floating point sizes, and no card currently 
> supports 64-bit floating point. This creates two problems. A) POVRay 
> would be limited to using one those floating point processes that "do" 
> use the same sizes as it does, for 32-bit systems, and b) for the 90% of 
> us who are *probably* at this point running on 64-bit processors

32-bit/64-bit CPUs have nothing to do with floating point. Your old 
Pentium II can do 64-bit floating point calculations.

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