Indeed, a very interesting looking development - ! And a perfectly balanced drive train to boot - ! Was that a carbon fibre belt drive I saw in the ad - ?A Pinion 18 speed bottom bracket gearbox, a triple chain ring, and SRAM Dual Drive at the back would give 1,458 gears.
Back in the real world, I like the look of the Pinion:
http://pinion.eu/p1-18-getriebe/