I'd say it all depends on how strong the 7nm process and Navi are.
If the gap between Navi and Vega at same power consumption isn't very big, then I fear a mid-gen upgrade will be necessary as the next gen would then be only barely over Pro/X visually, thus potentially not giving much incentive for those who have a mid-gen upgrade console to buy another console just yet. It would need a bigger upgrade to get enough of a gap for that, and that one might only be commercially possible (meaning cheap and lessened consumption enough to become viable for a console) later down the road.
In other words, we'll have to wait until we get some specs about the next gen and then we can assume if or if not.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/
