As far as 360 games go like Blops and say like Dragon Age they both say they support up to 1080p. Is there a noticable difference between tv's that have 720p and ones that support 1080p ?
No, not at all. The games are rendered in 720p no matter what. When the games on the 360 "runs" in 1080p, it's instead the 720p render that is "stretched out" to 1080p. Kinda like having a 720p image in Photoshop and then resize it into 1080p, so no added detail will be added cause it's a 720p image no matter what.
Also consider that both of them are LCD and only the 1080p is a LED. Would I see things graphically on the 1080p that I may have not seen on the 720p possibly? Things like dust wind, smoke, steam, or even shadows.
Thanks
No, visual effects like that doesn't depend on the resolution at all.