I hope this gets answered. I've become very interested in scalability, adaptive, and responsive web design and think it is important that everything run on everything and look nice :-)
I still don't have a Peak, but I think Firefox OS has to be scalable as much as possible. Seems like an easy thing to test, at least visually.
I'm open to either solution: make apps solve the problem or make the OS do it. But it might be better to have the app do the adapting because they can measure the real estate and shuffle things around to suit. Especially on Firefox OS phones, which by their budgetary nature, might be on the small side.