I'm not going to expect that a handheld that will be probably sold 299 will do the same thing than home consoles released 3 years ago.
It's just bonkers. Be real. It's already incredible that it can do better than the WiiU. The WiiU was a pretty powerful console, if it wasn't for the PowerPC, third party support would have been better.
Now the Switch is an improvement on every aspect, more ram, better GPU, better CPU, better architecture.
So yeah the third party support will be a lot better, but don't expect it to have parity, it will not have parity. It's really not as powerful as a PS4 or an Xbox one, it can't do what it does, the Switch is a handheld.
Now as a WiiU owner, I am still waiting for reasons to buy it (games, duh) but I'm not expecting ME Andromeda, Red Dead Redemption 2, BF1, For Honor, or FF XV on it. It's not impossible, but this is really really far fetched, especially when you know how much developpers struggle with the "lack of power" of the PS4 and One.