Quote - ... but no word about system requirements ...

I doubt there'll be much change apart from variation in the supported OSs (I'd guess (and hope) that XP will be the minimum supported).
For Macs it's difficult to speculate what will be supported probably nothing to old (for some value of old).

Quote - ... or price ...

I don't anticipate a price increase, but I guess for most people are only interested in the upgrade price and what (if any) pre-order deals there may be.
I wouldn't be that surprised if they give some indication at (or just after) SigGraph.