I'm wondering too 🙂
I sure hope so! However some claim 1080p wouldn't look much better than 720p because 1280x720 can be filled in the 2560x1440 iMac easily by combining 4 pixels to act as 1, so the image is sharp (however pixelated). 1920x1080 can't be displayed like that, and wouldn't look less pixelated since most PS3/Xbox 360 games run natively on 720p.