Benefits to serving on an IEEE Standards Association?
Jon Custer's comment is spot-on. You will meet (hopefully) smart people across many disciplines and have forced exposure to different areas of expertise. You will also get hands-on experience in negotiation and compromise, which is always handy.

Your question didn't ask about downsides, though, which probably should be mentioned.


Writing standards is a very tedious and often frustratingly political endeavor.
This can take valuable time from the doing actual research.
There is no guarantee that the standards you create will actually be followed in The Real World, which can be kind of depressing.