There was a time NVIDIA was getting OUT of the tablet biz because there was no money in it for them. They pretty much stopped working on tablet mobile after the Tegra X1.
They do charge a premium for their products, but they aren't Apple in that regard for the mobile space. It's a very crowded market. There's no killer appliances/apps that requires that kind of mobile power to justify their premium. (other than the Nintendo Switch/Shield) And the Shield is many ways is mediocre as there are plenty of cheaper or better alternatives to replace it. It's rather long in the tooth.