...swayed by the critics of the autofocus not to pull the trigger. I am trying to upgrade from a rebel xsi so this will be my first camera for video too. I want a camera that does both well. I don't know if I can wait for the t5 as I suspect I'd have to wait a year. If I don't use the af feature is it hard to do manual focusing?
What's the problem with the T4i's AF?? It inherited the AF sensor of the 40D/50D/60D, a very capable system (to get better, you need a 7D or 5DIII). I expect the Rebel/xxxD line will keep that AF sensor for the next few update cycles, so if you want better, you'll have a long wait.
Or, did you mean the video AF? If you want AF during video, that suggests you intend to shoot 'casual' video with a dSLR - there are many reasons why that's not a great idea, and why dSLR video generally involves tripod/fluid head, steadicam, external mic, Zacuto EVF, and other not-cheap accessories. For casual video, you're better off with a good camcorder, with the dSLR for stills, and for that, the T4i will be very good.