Well those phones have additional hardware for image processing, and the camera software is rather mature.
My guess is that they will work to port much of it over, the question is how long will it take to do that and whether you'll have to buy a new phone to get it.
I doubt the Apollo stock camera will be anything like that, though. Microsoft made only the bare minimum for WP7 and gave the OEMs rights to modify the stock camera if they wanted. That's why the HD7 has almost barebones camera software but the Focus, for example, allows you to adjust things that aren't available on the HD7.
Haven't really played with the Titan or Focus S camera beyond taking some test shots to test default setting quality at max resolution, but from what I've seen it wasn't a huge step above what Samsung did in their first-gen WP7 devices.
I think this is one area where the OEMs may have to step up, and it's a potential playing field for differentiation in the future. Yea, HTC's new camera hardware/software is amazing. Usually don't perform nearly as well for video, though, unfortunately.