As I understand it, it used to be possible to install and boot a client from an internal hard drive, but in not any longer. For me it would be very useful to be able to install the 810 MD client on a local hard drive. Even better would be to have the option to install on a partition for dual booting. This would allow computers that don't pxe boot to be used. Nic cards that are not pxe supported, wifi without an extra wap for laptops that move around a lot or for areas without a LAN drop...
If it was possible to install a clean untouched Kubuntu then slap LinuxMCE on top and boot from that as a Media Director I have at least 2 computers I'd immediately start using, my son's desktop and a laptop. Both of which hang during the pxe boot/install. The wireless aspect alone would make this a big win for some people.
Allowing for adding LMCE on top of a running Kubuntu may also allow for a wider hardware base, perhaps things like AppleTV or other types of hardware not included in the LMCE install image.
Netbooting a diskless MD is the best way to go, but nothing wrong with more options.
(posting this in users so not to muck up the dev area with user questions, if it belongs elsewhere feel free to move it)