Compatible with everything they have done during the past 18 months as well. Only part left to innovate is the camera development and squeezing few more megapixels in. Maybe the location & mapping stuff also. The again, Microsoft OEMs don't really need to innovate anyway. Thats up to Microsoft. OEMs need to come up with marketing and/or pricing that gives reason to buy hardware from manufacturer X rather than Y. And well, Windows Phone manufacturers also have the extra effort of praying for the miracle of consumers someday wanting to buy WP phones from anyone to begin with. Producing that miracle is up to MIcrosoft as well.