At this point, I doubt how open Sailfish is going to be.
We all know Tizen and FirefoxOS's are quite dull.

So the only thing I can think of, would be a spin-off between Mer, Sailfish (some parts at least) and Ubuntu-for-Phone. That Hybrid OS would be pretty tantalizing.

Still, at this point I don't think I'd be able to fully rely on it.
Probably stick to a Samsung NOTE with Android, and get it to dualboot the madafaka!