MSI is reportedly working on a portable gaming PC that is battery powered, which you can plug your VR headset into, strap it onto your back like a backpack and walk around in an open space. This is not an official product, MSI is just tinkering around with the idea.
The backpack PC will be powered by desktop-grade Core i7 processors and GeForce GTX 980 graphics (likely the 1080M when it comes out). This essentially will give you less cable clutter and allow you to walk around more without being confined to a static gaming PC.
Expect to see this product shown or at least detailed at Computex 2016 next week.