Quite possible but the majority of PS3/360 titles were running at 720p up from the 480 of the Wii so they were still in the same region of pixels, but a ton of Switch titles right now are sub 1080p at 720/900p and I think the next gen machines are gonna be looking at pushing for 4k or 1440p at least in all titles, a dev wanting to create a game for the machine selling like hot cakes is going to need to do a hell of a lot of work to go from 720p>4k especially if they're going to be looking at the sales of one of those systems if one does great and the other tanks it's very unlikely that they'll get 3rd party love @ 4k
Sorry I'm just looking through my crystal ball here and it gets a bit muddy at 18 months out :D who knows what happens, maybe it turns out that bitter taste on the Switch carts actually makes people die from dysentry 3 years after licking them so the Switch will have no install base when the next Sony / MS consoles drop.
Rendering at 4K doesn't take more work than rendering at 720p/900p/1080p.
Creating more detailed assets takes more work, but then that never stopped devs prioritizing PS3/360 over Wii and PS4/Xbone over Wii U/Switch.
Third party's main focus next gen will be on Playstation and Xbox, just like it has been for the past almost two decades. Switch won't impact PS5 just like it's not currently impacting PS4.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023.