Why would you name a gaming adjacent system “PortalVR”? I doubt you’ll get in trouble for it but you’re going to confuse so many Portal fans (and there are a lot of them).
And there's already a VR headset named Portal that's not confusing those fans.
Though uh that one has some potential for confusion.
It’s called PortalVR because there is no better name to describe what it’s like to play VR this way. It is like playing games by looking through a portal you hold in your hand.
If they're truly attached to it they shouldn't change now of course.