Windows 8 Phone.. GAMING??

I know WP8 runs on Qualcomm chipset rather than Intel x86..

what is SHARED WINDOWS CORE??

can we expect devs to port present & past EA/Ubisoft PC titles to Windows Phone 8 in future??

As far as I know Windows 8 & Windows Phone 8 is almost similar.. that's what being said at the MS event. So going by this statement all apps/games will be compatible across PC & mobile.. In that case as mobile wouldn't offer graphic prowess of PC, Do Devs prefer to bring down the quality of games?? & Do advancement in GFX cards technology decrease?