I wish linux-based phones go mainstream in the future, where privacy is utmost valued and customization is unprecedented. Everyone would be able to install multiple Linux-based OSes that fit their needs.
Not 2021 per se, but I feel electric cars will be the future. And much of the base for that could be developed in 2021, including maybe some manufacturer finally striking a deal with Tesla for its batteries, and maybe some manufacturer announcing compatibility with Tesla's charging network.
