Like I said, we disagree. Flippy screen? Yea I can actually see a good use for that. Personally, I like optical finders but yes I've been in situations where a flippy screen would be nice. If it's worth $100 to you, it's worth $100 to you.
But wireless control of your flashes? They only work when they're in line of sight, and there's no guarantee they're gonna fire. It also uses those annoying pre-flashes which just aren't good for any living subjects. No way I'm going to trust that at a shoot - it's a last resort. Plus it adds another second or so to the shutter lag which is ridiculous. If you're dabbling in off-camera flash, you might as well do it the right way and do it manually, and at the very least with reliable and instantaneous triggering. Just my two cents on the matter.
As far as the huge upgrade in AF and fps between the T3i and T4i, maybe that doesn't matter to you. This is just another place where we disagree.