They've done it before, why would they suddenly stop now? The only problem with this is how will it benefit original Switch owners if newer games require you to have a new "Switch Pro" to play reasonably. It works with the Xbone/PS4/PS4PRO/XBX because the original consoles are already powerful enough to play most modern games in the first place. I don't see them wanting to limit people like they tried to do with the DSI and New 3DS.
This is a very good point and probably the reason they won't go for a big tech leap.