I'm attracted to the Nupace because it's a design that I hadn't seen before. I think that it might be interesting to see how it's use might progress in the near future.
I also find the whole thing fascinating and would like to see how well it works in real world use. Indeed, if it proves durable enough and the cost penalty can be reduced it may be a sufficient improvement over hub gears that it replaces them in many bikes. As someone noted, the 14-speed Rohloff isn't exactly given away either.
I really hope they succeed and my previous point was only that it isn't magic and isn't going to transform or reduce the effort to ride a bike. We'll see.