It is a bit unfortunate to see divergence only because it would mean the reversion of platform-independent development that browsers currently allow.
At the same time though, sacrificing progress for standardization's sake is most unwanted. It is inevitable that some companies will make some superior innovation, and other companies might not want to adapt that right away, or perhaps they'd like to build something even better. But that's okay.
This kind of leapfrog might be hard for developers because they will have to have different branches of their product, but it is a net win for users because the ones on the "superior" platforms get access to the best technology around and it therefore places pressure on the competition to adopt this new superior technology or move ahead with something better of their own.
At the same time though, sacrificing progress for standardization's sake is most unwanted. It is inevitable that some companies will make some superior innovation, and other companies might not want to adapt that right away, or perhaps they'd like to build something even better. But that's okay.
This kind of leapfrog might be hard for developers because they will have to have different branches of their product, but it is a net win for users because the ones on the "superior" platforms get access to the best technology around and it therefore places pressure on the competition to adopt this new superior technology or move ahead with something better of their own.