I do agree it bodes well for the 70D getting some useful upgrades, seeing as the T4i is currently on par with the 60D on everything but build quality.
Don't forget the better ergonomics of the 60d - buttons, back dial, top lcd. I got the 60d because of these, and I wouldn't want any other body without them, no matter what the specs are, and I'm not just saying this because I happen to have a 60d. Many people who get excited about the 650d are 7d/5d amateurs that wouldn't touch a Rebel with a 10 feet pole.
Can Magic Lantern work on the Digic V+ ?Yes they made some part of it work in the 5diii, but be prepared for wait for a usable version.
It seems indeed promising, but don't be so quick to announce ml on the digic5 - just now they can only print "Hello, World", no one can say if all features will work on the new processor. And I estimate it'll take about a year to get a stable port - ml is basically developed by a single person (Alex).