Indeed both pointless.
Intel for IoT is pointless, unless Intel does new ARMs of its own.
Microsoft anything for ARM is pointless. They stopped proper embedded NT and multi-platform NT support after NT 4.0. They killed Win CE and Win CE embedded after killing multi-platform.
Win 10 is a sick joke. The Pi and IoT both have alternates to Windows if you don't want Linux, though you'd be looking at some pretty niche OS other than Linux.
This is Marketing, not useful platform.