Xg1v4 is a newly redesigned Box for Xfinity Comcast Customers ,who have service with them , with this box you will be future proof for upcoming on demand 4K Movies with HDR & Upcoming 4K Programming later on this year , for now you can only stream Netflix 4K & Youtube , however you do get a benefit of Upscaling it through this device for your current HD source channels , for more info , Watch the entire video .