Rumour has it that Nintendo is developing two new Switch models, with one having been spotted in new firmware. Previously rumoured to be using a custom NVIDIA Volta GPU, the model is said to be based on the Tegra X1+ instead. The device has a secondary display of sorts too, and may feature alongside a docked-only console codenamed Calcio.
https://www.notebookcheck.net/Nintendo-may-have-two-new-Switch-models-in-development-a-dedicated-console-and-one-with-a-secondary-display.461611.0.html