I've always thought it would be cool if, instead of an instrument cluster, there's a bluetooth transmitter. And then a receiver in your helmet that projects speed, rpm, fuel and warning lights to either side or the bottom/top of your visor.
I'd pay upwards of $600 for such a thing. But I imaging it wouldn't be that cheap when it's new tech.
It's doable with today's tech, just whether or not it's lucrative is the big question.
2007 Honda 919.
Used to be Red, now it's Green. Open for name suggestions.