Seriously, the caps will not touch anyone in currently available gear unless you're stacking Block Value.
I was playing with it over the weekend, most Warriors/Pallies in the best gear (not stacking block) will still only be sporting 1300-1600 after the patch. If you stack it hard, you could hit the cap with the gear available, but only if you're using the best block gear from Naxx/Uld etc.
I am curious though about what this means for using Shield Block. I assume if you have 2k block value and you pop Shield Block, it won't cap you at 2760, just apply a multiplier. Otherwise it would be a silly way to work it.