Fixed gear unicycle 20" --> 36"

Thanks for all the reactions, links and information!

Summarising, the experience on a “fast” 20" will never be as good as on a real 36". Could that be e.g. compared to the experience riding a Brompton foldable bike (16" wheel size), and a normal size bicycle?

I really enjoy the different options people come up with to gear up their unicycle. Nevertheless, I would be in favor of a planteray (hub) approach, as this would spoil the least to the visual simplicity (for me, I guess this is personal).

In the meantime, I have seen an original concept to add a planetary gear to a trike. Would there be any chance of getting this to work on a unicycle (especially given the high torque I read about everywhere)?