Apple doesn't allow third-party web browsers on iOS and Safari doesn't have a good track record of supporting new web APIs and standards, so making a successful

Apple doesn't allow third-party web browsers on iOS and Safari doesn't have a good track record of supporting new web APIs and standards, so making a successful streaming app might be possible but it'd be a precarious project at the whims of a single company. You'd likely also have a hard time adding new features as iOS users would be holding you back which would cripple all of your other users by association.