I think there is a chance that mini consoles will have its own booth at more gaming conferences like E3 and Tokyo Game Show and events like eSports/Pro-gaming in a few years.
Mini consoles will be better in quality, and have more high quality games for them, so gaming conferences and event staff maybe more likely to include mini consoles in their gaming conferences and events booths.
Hopefully, there would still be gaming devices like mini consoles at cons when bigger consoles take a leave.
I think Google may release a mini game console for their Google Stadia game streaming service and Android TV games, and Steam may also spend more time on their Steam Machine/Box when more games are available for Steam for Linux.
There is also still Nvidia Shield TV and Atari mini consoles which are both mini consoles with many games.
