It is good to see the progression of xbox modifications, but I do like my hard drive, not to mention the expensive cost of DVD9 for those larger games.
My prediction is that they are going to start encoding every game with a unique encrypted ID# for live purposes. That way M$ can track down the sources of copied games and instantly ban those who have two same ID#'s on live at the same time. I am predicting this for the x360 since orginal xbox is on its way out.
But then again, what do i know.

yes true , also you can boot only RAW 1:1 backups ( without any fix ).
and M$ can make MD5 check on Firmware .
so best way to do this is make "edit" tool for firmware so everyone can edit his own Firmware and get deferent MD5.
also I guess it will boot only same region games , if you have USA/NTSC Console you can boot only USA/NTSC Games.