Nintendo and Nvidia signed for a long time collaboration for console hardware, so probably we will see some iteration going forward (such as the Switch 2019 revision, equipped with X1+).
OG Switch is based on Tegra X1 from Shield TV 2015, latest revision is based on Shield TV 2019.
When Nvidia release its brand new Shield TV (2021?) with a totally new chipset I think a new Switch 2 will follow in the coming years (2022/2023?).







