Like yes, really! You have to have a hacked 3DS to make the magic happen, but now that the system has been orphaned by Nintendo, anyone who's still using one is doing the h-Shop thing anyway.
(By the way, it's the SG-1000 version, running in Genesis Plus GX. I haven't turbocharged the graphics... they're just straight up MSX1 quality. Nifty idea, though.)