As a person who regularly follows phone news I agree with u/Evcher , traditional slab smartphones have hit a plateau and will probably not progress further outside of processor, camera and battery improvements on a more marginal basis.

Foldable phones do seem like they are improving and a lot of manufacturers are starting to make them. This will most likely bring down the price as we have started to see with brands like Techno releasing a cheaper galaxy fold style phone. We may see companies release trifolds once foldables get thinner.

Outside of that unless technology improves massively I don't think we will ever see wearable ar glasses, Google glass just failed again. Nor do we have anywhere near the technology or the political will to start putting chips in people's brains. Overall I expect to see more marginal updates year over year that add up in the long run.