Not to detract from any technical achievement, but I don't think a solution that requires you to wear a device on your finger is ever going to reach mass-market

Not to detract from any technical achievement, but I don't think a solution that requires you to wear a device on your finger is ever going to reach mass-market acceptance. Maybe niche (industrial?) use cases? (And even then I'm skeptical). Also, to me, the demo looked simulated.