I don't think a "Switch Pro" is happening.
We're already into the second half of 2020 and there's no reliable murmurs on a Switch Pro at all, whereas for the Mariko model revisions we had a ton of chatter.
I think you'll maybe get a "New Switch" type revision with a larger screen for both the main line and Lite models (easy enough to eat into the dead bezel space), maybe even a further die shrink to 7nm or 8nm but a full on Pro like the PS4 Pro/XBX I don't think is happening.
If it was I think we'd have heard more about it. Nvidia recruiting for a chip that has next-generation graphics and DLSS 2.0 integration points much moreso to well a next generation Switch. DLSS requires completely different hardware that the current Switch simply doesn't even have to begin with (Tensor cores).
To make a new chip with Tensor cores would be expensive, it's not the like DSi and New 3DS where they basically just kept the same GPU and just overclocked the CPU and threw in some extra RAM. You can't do DLSS 2.0 with just more RAM and higher clocked CPUs ... even the PS5 and XSX can't do DLSS 2.0 in the same way Nvidia does. It requires Tensor cores.
Besides that a Switch Pro "for third party games" in 2021 doesn't make a whole lot of sense as most 3rd parties are moving on to the PS5/XSX, the Switch would need a full next-generation architecture to be able to get any of those ports.Last edited by Soundwave - on 30 July 2020