Though there WILL be ethical implications.

It's highly unlikely it will be legal to do this kind of operation in the next 10-15 years, even if the transplant is successful.

Were would you get the donor body ? Even if it works, it'll have been VERY risky.

In short, I think even if it works there'll be a period of at least a few years while they study how the operation went and make the technique better before anyone follows along.

But maybe the operation itself will yield some interesting information...

Now that I think about it, he'll probably need to be on immune suppressors for life, so the body doesn't try and reject the head. There's also going to be a lot of brain rewiring needed so the brain can get used to a completely different body.
Given he is paralyzed, the brain regions responsible for moving all his limbs are probably slightly degraded, not having been used in so long, so he's going to have one hell of a physical rehabilitation training schedule afterwards.

But let's hope for the best.