A lot of those cross-gen ports will be just barely running on PS4/Xbone though, just like say MGS5, Middle Earth Shadow of Mordor, or Far Cry 4 just barely ran on PS3/360. And if they just barely run on PS4/Xbone, I wouldn't count on Switch Pro getting a look in.
Once again though, I think I'm gonna bow out of this discussion as I'm trying to be less negative on VGChartz.
Again it's not about having every third party title or screaming at third parties every time some game isn't on the system or is like 2 months late. Bottom line is a Pro model will allow a lot more kinds of games onto the Switch. If they double or triple the horsepower of that chip, the amount of games it can run increase by a lot and some devs will port some content in that case. And yes, some of them may even be older PS4/XB1 games and that's fine. There are several hundred decent games on the PS4/XB1 that would be fun to play on the go for a lot of people.
Even what the Wii U got was OK, the reason people got so down on that was because of the whole "well ... sniff ... this was on the PS3/360 already 2 months ago!", Need for Speed on Wii U was a perfectly fun game to play. COD + Batman + Assassin's Creed at the time were probably 3/6 or 7 top third party IP, that's not that bad at all.
On the Switch situations like that will still be beneficial to the system because the portability is a game changer in the value of the software. People are enjoying Diablo III which is like a 5+ year old game on Switch, there's lots of content besides just the endless pissing match of "well you got this new big third party game, we need to match it!!!".