The Windows Mixed Reality headsets made by several manufacturers like Samsung and Acer is actually for VR only. IMO Microsoft is calling this Mixed Reality because they are using the same platform for Hololens as well. In other words, Microsoft Mixed Reality means these VR headsets and also the Hololens.
So to answer your question, no these Mixed Reality headsets are actually for VR only. Hololens is for AR on the Windows platform.