man... hold you breath...
1. nothing is official released, so all the pros & cons are speculations - nothing else. OK MS has shown somthing on MIX etc. but no one outside of MS realy now how near the presented system is to the final version!
2. WM7 should be an iphone-killer and an iphone is a device for endcustomers, not for it-pros! thats the reason why there will be a 6.x-version parallel to WM7.
So stay cool and wait for the final version, and when it arrives, you will know if you can live with an end-user-iphone-killer-device or if you will need a pro-user-device - than you have to wait for WM8 which will be a real new implmented OS.
WM7 is a quick reaction to the iphone - nothing else. microsoft has millions of business-customers which are using devices with windows mobile on. and thats the market MS makes money and that are th customers MS has to care about! Don't hype WM7 to much