What factors will satisfy us that blockchain technology is on track for realizing its potential?
Because as of now we see very little in the way of commercial and user engagement...
I'm very surprised at you for asking this question after all the evidence at your disposal. The blockchain technology has brought the revolution of cryptocurrencies and I call that a success, it's changed the way we move money (fiat) around and I call that a successful revolution, it's ensured security and transparency in dealing with our finances online and that can't be nothing less than a successful innovation.