No one can answer your question for certain. Until source is released, it seems no, you can't overclock. And when it is released, devs will need to work on custom kernels with overclocking ability.
So this discussion is all speculation. Personally, I'd never buy a device with hopes that one day I might be able to do something. I buy a device that suits my needs now. Cause nothing is ever a sure thing in the future.
Anyway.....if you want to ask this question and discuss it with others ...our general Q&A section would probably be the place for it. XDA Assist is not a place for discussions.