Nintendo has already released most of its heavy hitters by now. Considering they still have to release a couple of WiiU ports, plus Botw2 and Pokemon Snap, and assuming we'll get a Mario Odyssey 2, a Pokemon remake and/or a new gen and a Fire Emblem title, they really don't have that many heavy hitters left to sell new hardware. By the end of this year, most people who wanted a Switch will have bought one.
I mean, it's fine by me, most of the games I'm interested in for the Switch are 3rd parties anyway, but I do wonder whether this will make Nintendo bother with a Super Switch or whatever the upgraded version might be called. I can absolutely see a cheap TV only version including a pair of joycons, though.