1. Sony is already the market-beating performer in AF accuracy and speed. What more do you want?
2. True, tough right now the A700 has the same noise as the D300...
3. Sony cameras usually lead the way in resolution. How much more do you want to capture?
I think your main issue would be with the JPEG processing. If you shoot RAW, you'll really appreciate the details you capture.
Well got improvements then worth the upgrade ma right hahaha.
If they come out same performance over the current models then the consideration
will be the pricing liao.
Anyway there are always room for improvements.