720p mixes well with 1080p!
 

the 720 footage just looks a slightly soft when viewed full 1080, but sharpening helps alot!

I've had mixed results with 720P. On one video, Spring in Montana, I shot a fast moving carousel in 720 and 1080 and the 720P60 was much better. I recently shot some aerial footage from a helicopter in 720P and was not happy with it at all. A lot of moire and it just didn't look as clean.

It would be great if we could shoot 1080P60...

I know what you mean; I feel that way about the quality overall sometimes. do you know if 1080 60p is possible with a firmware update or out of limits..

I don't know, that's a good question.

If the Panasonic TM700, a consumer grade camcorder can record 1080P60, I don't see why Canon can't figure it out. But I'm not going to hold my breath.

Generally I edit in a 24 frame timeline so what I have experimented a bit with is shooting 1080P30 and in Cinema tools converting it to 24 frames/second. This essentially slows the footage down by 20%, nice and smooth, but its still 1080.