Minor thrread revival: Microsoft appear to be backing down a little, so what was described above may change a bit.
What will not change:
You must have a PC with a UEFI BIOS, no ifs or buts. So my laptop wont cut it.
Otherwise, there are now minor during-install registry hacks that make it work, and I'm currently trying it on my TV box, an i5-3470 with 8GB RAM.
Watch this space...