1) Somehow both GNOME and KDE got much better in the last 2 years. It's very smooth and polished experience that I now prefer to both MacOS and Windows. I only need to install 1 or 2 extensions and it's good to go for me.
2) AI! It's orders of magnitudes easier to fix any Linux issue now compared to 3 years ago. The issues that would take a whole afternoon of fighting are now just a couple back-and-forths with the LLM like ChatGPT or Gemini.
3) Valve and SteamOS. The large and mostly successful push by Valve to make Linux be the platform for gaming has cleared many Linux issues and hurdles on the way. I think this will have ripple effects in the industry. My prediction is that thanks to Valve and SteamOS we will see a viable, widely used Linux based phone in the next 3 years.