Given the performance critical nature of how this changes things I personally think it's unlikely. It does stuff like change the way spinlocks work in the Kernel which would be not only difficult, but expensive without recompilation. The best I think you'll get is a boot-time option to switch between pre-compiled kernels.

That being said, most of the RT Linux patches over the years are actually compiled in all the time anyway so a lot of these improvements have been incorporated for a long time.