Too bad they didn't do power consumption numbers that's what I'd be really interested in. A power comparison between the RV530XT X1600XT and the RV535XT X1650Pro would determine how efficient the 80nm process really is.
In terms of the X1650Pro's price advantage over the 7600GS, I don't think it'll be there long. The RV570 X1950Pro is supposed to come in at $199 and with the 7600GT unable to compete, my understanding is that there will be a new 7900GS at $199. The RV560 X1650XT and 7600GT will then be around $149 and the RV535XT X1650Pro and 7600GS at $99.
I would think this would seriously lower X1600 pro prices.
The X1600Pro has been relabeled the X1300XT and the X1650Pro is actually the old X1600XT.