Due to the nature of the automated build system, creating an image that automatically boots into a graphical desktop environment for immediate access to the computer is just one of the many implementations possible with T2.
The historic proof of concept live CD target inherited from ROCK Linux was quite weak. For the T2 6.0 release the live CD code was completely reimplemented from scratch with real graphic card detection and state of the art open source components:
Furthermore the LiveCD no longer is a static T2 build target, but a flexible build output post-processing that can be applied to any other custom target (given it matches a few minimal constraints such as including squashfs & unionfs as well as the usual default T2 early user-space statically linked with dietlibc).
We also maintain a list of already certified hardware.