I am inclined to wait for the 70d, but could be tempted if:
-improve AF (not expecting 7D here, just better than the past rebels)
-at least 6fps (with at least 12 raw buffer)
-better high ISO performance
Get a 60D - it has exactly the specs you name above (apart from the better high ISO, which will need a new sensor). If they would put these features in the T4i, it would be a 60D in a less ergonomic, but smaller body. Not sure that this would make sense from a marketing standpoint.
Yes, but the t4i has to be updated compared to the t3i, else why call it the next generation of rebel? The t3i has a 3.7 fps burst rate. Is it that big of a leap to give it 6fps? It would best the new Nikon offering. So what if it is faster than the old 60D, that camera will be out of production before Christmas. I would guess the 70D will have at least 8fps.
But yes, I get your point, these specs are essentially the 60D. And in reality my next camera will be something from the xxD line. I can't see getting another rebel. The IQ is OK, just not enough quick flexibility for me. And it feels a little flimsy.
The big question is where does the Rebel line go? Because the mirrorless cams are starting to make a good argument as an alternative to an entry level DSLR. Does canon make the Rebels mirrorless? Does it take the Rebels upscale to put some distance between them and the mirrorless? And if Canon does take the rebel upscale, what does that do to the xxD line? Anyway, it is a great time to be in the market for a new camera - things are getting interesting.