Nvidia is yet to announce a successor to the Shield TV STB, but a leak on Amazon reveals the "Nvidia Shield TV Pro," a supposed update promising improvements thanks to an update to a Tegra X1+ processor.
As spotted by 9to5Google, the soon deleted Amazon listing featured a device identical to the 2017 Shield TV refresh. It not only features the chassis with the green accent light, it also has the same x2 USB, ethernet and HDMI ports. However the upgrade to a Tegra X1+ processor promises a 25% performance boost, together with 3GB RAM and 16GB of storage (expandable by adding a storage device to the USB ports). The processor update also allows Dolby Vision support, with both Dolby Vision HDR for the visuals and immersive audio via Dolby Atmos and Dolby Digital Plus.