Help me understand Play Anywhere and why it even matters

I guess I don’t really get it…if I have an Xbox that I play on. Why would it matter if I can go play on my PC that is also in my house.

If I’m not in a position to be at home playing, I’m out and about in which playing on my phone or a handheld isn’t really an option

It’s not that I don’t get that it’s a cool ancillary service. But I’m having a hard time understanding how this really matters to 99% of gamers and why MS continues to treat it like it’s some show stopper.

People say “for those that travel a lot” but let’s be real. That’s not even a fraction of the demographic