I'm sure this has been discussed to death on drobe but...
(As I'm new-ish)
Surely if RISC OS is to play to its strengths, and in particular the low power consumption aspect, then an Iyonix/Omega laptop is the sensible direction to be heading in.
Some-one, somewhere on drobe recently suggested the finished product would cost 2000 quid. If it did then I'd say that's not unreasonable given that the existing Iyonix costs 1300 + 300 for a good monitor.
If it had 1280 x 1024 I'd go for it.