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There are features that it makes sense to charge pros an arm and a leg for.  Network rendering is a good one as most hobbyists do not have render farms at home.  64-bit makes less sense as nearly every new computer sold is now 64-bit, and that particular feature has already been implemented.  

Without a 64-bit OS you won't get 64-bit performance. I see many more computers in stores with 32-bit versions of Vista. SM is probably correct in assuming or maybe even knowing that most Poser users have 32-bit OS systems. They could probably base it a little on the sales of Poser Pro and the comments made by users here.

I do hope that 64-bit is planned eventually for regular Poser and that they roll out a Poser Pro with 8's features soon for the Pro users.