That doesn't mean the Vita controller mapping they provide will be any good. Just that they're required to submit a mapping.
Personally, I'm just glad its an OS level service. I'll deal with the controls on a game by game basis and hope they're re-mappable, just as they are now.
Then again, to pass certification, you don't have to make a good game, but presumably in reviews, people will comment on how well the Vita Remote Play controls were implemented in most games. And gamers will complain if they are total crap.