Idk man, I think they will just move over to a separate launcher instead of recreating Habbo in html5 I also don't get why they would move over to html5, Habbo isn't as big anymore as its used to be so I don't get why they would invest and put recources into porting Habbo into html5.
edit:
lets say if they do move over I am curious what kind of protections they would be using to protect their client and how fast the people on this forum could crack it so that is a nice thing about it. finally we don't have to rely on using closed source html5 projects that's bound to create drama in the scene :/