Originally Posted by estral
Eventually, it will have to happen because of the new machines being shipped 64 bit only.
You are probably right,....eventually. However even though 64 bit machines have been the norm for a while now, there is no requirement to run a 64 bit OS on them. There is so little software that really takes advantage of 64 bit capabilities, that it is often not worth the loss of compatibility to run a 64 bit OS. Obviously that will eventually change, given enough time.
Here is a thread about running Calibre in a 32 bit VM on a 64 bit machine.