My wife bought a T4i two weeks ago and is thrilled. A good part of that happiness is the touch screen which does a very nice job of creating a unified user interface for someone starting out. She commented that our 7D and 40D were intimidating in the past when she has tried to learn how to use them.
I see the rumored 100D being a nice addition to the entry market:
- T4i - biggest with a pivot screen that is handy for video.
- 100D - smaller and lighter but still with fast focusing for photos.
- M - really small at the loss of focus speed.
Obviously the three cameras have almost identical internals and that the difference is in the form. If the rumored 100D were available two weeks ago I think it might have won out over the T4i for my wife.
All of these cameras are answers to someone considering a micro4/3 camera but who likes the idea of getting into a lens-lineup that can grow with them in the future.