Well we aren't talking about today's technology, we're talking about a release in over 3 years from now. A Switch 2 released in 2023 I would expect to at least be more powerful than the base PS4. Main reason I would want Nintendo to target something around PS4 Pro level is so that Switch 2 could do a better job of getting third parties to port their AAA games over to Switch 2, obviously they'd still be graphically downgraded, but still close enough in power to be running well and looking great on Switch 2.
Unless the Switch 2 turns out to be laptop in size, thats just not happending.
if it stays in more or less same shape/size as the current switch, that wont be possible, even in 2023.
A slightly bigger switch mode, with a bigger screen 1080p, and performance around a PS4 (not pro),
will still be a huge step-up from the current Switch.
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071