I'm really glad I got my M41 in November when the $300 discount/instant rebate was being offered. IMHO, there is no reason for owners of last year's M-series to "upgrade". The size reduction touted by Canon is misleading because the battery now sticks out the back (rather than being flush with the body). They also eliminated the viewfinder (on the M41) and dual SD card slots. To me, this model is a step backwards. It remains to be seen whether the claimed 20% improvement in low-light sensitivity is really due to sensor improvements or rather more heavy noise reduction.
The lack of 1080/60p is disappointing, but I was somewhat expecting this would be the case. I suspect it could be a fundamental limitation with this sensor and/or imaging pipeline. That said, I would be very surprised if Canon doesn't add 1080/60p to next year's models.