I got my RTM .isos today via msdn. I have installed it on my tablet pc but not in a hurry to deploy on htpc yet. I do have x86 as dual boot but not ready to switch to the x64 full time OS yet... Theres a couple of )htpc related) editing apps I need to catch up with W7.
As much as I can see, its very much like RC. In fact fixes and teaks I've deployed in RC(such as the sidebar fix) worked fine in RTM. Will probably give KOTOR a go on it soon to report to the KOTOR peeps.
Asinus asinum fricat