I use Sunshine and Moonlight when I'm out away from my Windows laptop in my home office and back near the router in the front room over my Macbook air, it's great when you can get directly on the LAN with it. But then, RDP is also better over the LAN, and casual disconnection is easier.

But if I want to do graphics-intensive work on the headless tower, I'll use Sunshine and Moonlight.