Yep it is indeed planned, in fact I mentioned it in the post today announcing 3.2. But when I make the switch to WP8 to support resolutions we have to then maintain two separate versions of the code, one for WP7 and one for WP8. That will be a nightmare if I just suddenly switch, so instead I need to try and be clever about it and make as much of my code abstract so that it can be shared.
All of this may have happened sooner if we hadn't had access to the WP8 SDK only a few days before release...