That is quite a difference in size, and would make working in tight areas a joy. I usually use 1/2" drive on suspension work and in many cases the impact along with the socket is too long to get a straight shot at some areas. 3/8" drive impacts will fit, but are often too weak to get the job done.
Thanks for posting -- I don't need another impact, nor socket set, but this is a solution that would be VERY convenient to have.