You don't need to be a rocket scientist to notice that the limited number of windows on the Nintendo Switch HOME screen won't last players forever. Of course, the system isn't going to stop you from owning lots of games, so it opens up another screen once you've passed a modest-ish number of titles.
As we download pretty much everything for video content we've come up against this limitation, and what we have is a new menu for displaying more software. You can see it below.
The wording of 'software' obviously keeps things open for other apps, TV streaming and so on. Yet that's not 'new', as such.
So there you go, rather than just adding lots of sideways windows you have a separate screen - the design is quite reminiscent of the PS4 UI, in a way.
Are you such a big spender that you've unlocked this menu?