Nintendo issued a major update for Switch last night, upgrading the firmware to version 10.0.0. You can read about all of the new features here.
Aside from what Nintendo officially shared, version 10.0.0 also appears to make some notable additions behind the scenes. Dataminer Mike Heskin, after poking through the update, reports that Nintendo has added preliminary support for a new hardware model, which is known as “nx-abcd”. Heskin further states that “3 of the 5 new DRAM profiles are for this new hardware type and there’s evidence of a secondary display of sorts being added exclusively on this model.”