720p is FULL HD. So is 1080i. 1080p being called "FullHD" is Sony marketing bull**** that caught on due to the average person being so ****ing stupid. Two things to answer to find out if 1080p means jack **** to you:
1. Size of TV
2. Distance from TV you sit
I'm 70" @ 12.5'. 1080p is hardly anything. 720p is 99% identical.