Am I missing something?
Assuming that one has a TV with a freesat tuner (unless these devices are intended to provide the signal to monitors or standard TVs) then surely twin tuners would allow you to record two things at once? Its just a bit strange that the marketing people are presenting something that appears to be different.
I really hope so as when I get a freesat dish, this is the sort of thing I would buy, particularly if I can archive HD content with full 1080p onto a removable disk or network this (rumours elsewhere speak of ethernet capability) to an external drive. I have a couple of their older HDD/DVD recorders which I really like and my only regret is I cannot swap out the analogue tuners for freeview ones to be able to continue using them after next year, unless of course anyone knows differently.