[Fnoord]

From a price/performance PoV I really liked the Nvidia Shield Tablet K1, but they no longer give it updates. Even LineageOS no longer does. An update with a similar form factor but a better resolution and a little bit more horsepower would be an instant "will probably buy" (I don't really need a tablet, and am trying to not get locked into Nvidia ecosystem, so those are for me two downsides of a new Nvidia Shield Tablet K1).

[Macha]

To be fair to nvidia, the 2014-2018 Android 5-7 support lifecycle for the shield tablet remains the best supported android device I've owned.

I wouldn't hold out for a successor though, Nvidia makes much of the internals of the Switch and I think another Nvidia branded tablet device would be too close to competition for Nintendo to allow.

[Fnoord]

My Fairphone 2 got 4 (and will get 5) years of support from a small company (Fairphone). Tablet-wise, I agree, although the K1 refresh got less long updates. Also, I don't expect a new tablet from Nvidia for the reason you mentioned. However the setopbox line I expect updates from (don't have one but heard universal praise). Thing is, I use a Steam Link and don't have Nvidia graphics card so no GeForce Now (don't like such vendor lock in either).