The Dyson fan heater is the one which perplexes me the most. Unlike other Dyson products past and present -which aimed to enter the exisiting market with a competing product- their fan heaters were not built to replace the tiny £10 fan heaters which people have under desks and so on, rather it seems to be targeted as a whole-of-room heating method, replacing which other method I am not sure.
Added to which, there is a strong market for electric focal point fires, many of which (particularly the inset type) contain fan heaters, and even modern bathrooms still have a wall-mounted fan heater in many homes, so to fit their fan heater technology into those situations would be quite worthwhile considering I beleive, but I doubt that this would be as 'exciting' for James Dyson.