I always had the feeling Netflix on Xbox looked terrible. Even 1080p movies on Plex or Blu Ray look 1000 times better. My feeling is 4k on Netflix app on Xbox is
How to Play Netflix Videos on Xbox | M4VGear
How to Check Netflix Video Playback Resolution? 480P, 1080P or 4K? - JayceOoi.com
6 Ways to improve Netflix on Xbox 360 | Sound & Vision
Xbox 360 HD-DVD Drive - HD-DVD Playback - On the Xbox 360 & on NVIDIA GPUs
Xbox 360 to offer first-ever Netflix HD streaming - CNET
Microsoft Xbox 360 Arcade Review | PCMag
Xbox Live updated, 360 Netflix exclusivity touted - GameSpot
Best Buy: Microsoft Xbox 360 S Gaming Console S7G-00001
Netflix Streaming Exclusive to Xbox 360, For Now | WIRED
Xbox One Netflix App Walkthrough - YouTube
Xbox Live gets 1080p Zune video store, Netflix browsing, Twitter and Facebook integration | Engadget
So the 360 can finally do 1080p Netflix now? : r/xbox360
Microsoft Xbox 360 Pro review: Microsoft Xbox 360 Pro - CNET
HD-DVD Player for Xbox 360 - Scott Hanselman's Blog