I don't care if they rewrite the camera app, so much as standardize a sufficient set of fine grained APIs so that other people can write great camera apps. I know there's a lot of low level, custom interaction with the DSP that is hard to capture in an API, but the current level of granularity is just woefully inadequate. If they just focused on getting a really detailed standard API as part of Android I'm sure a thousand beautiful camera apps would bloom and we might even see a whole new mini-industry come from specialist camera apps for specific situations.