I love my shield, it’s been a staple.
If they wanted to really knock it out the park, the next step would be a steamos port with DRM support.
Unless Valve are going to do some work to enable that and support a hardware backed chain of trust for drivers that's not going to happen.
(I think it should happen but that's not the same as that it will.)
It could be really interesting if they used a fraction of the tech they have or recently stopped using that could still fit here well.
DRM is anti-consumer malware, so I hope not.
There are other ways to source videos than paying a monthly fee forever for something that you will never own.