I'm excited about this. In Big Sur you'll be able to apply lighting effects, filters, crop and rotate VIDEOS in the Photos app. Basically, the same things you can do with Photos, you can do to an entire video. This means a lot of what people do with videos in iMovie and other tools can now be done right in Photos if you already have your videos stored there. This was added to Photos in iOS 13, but for some reason macOS was left out.
I think one of the weirdest things I do is to occasionally browse the Web with just the Terminal window. No images, not cursor, just plain HTML like it was 1990. I like to consume information like Wikipedia pages this way. Just sometimes. To do this, you've got to install Brew on your Mac (<a href="https://brew.sh" rel="nofollow noopener" target="_blank">https://brew.sh</a>) and then W3M is the browser (<a href="http://w3m.sourceforge.net" rel="nofollow noopener" target="_blank">http://w3m.sourceforge.net</a>).
iOS 14 allows you to place custom widgets on your Home Screen mixed in with your apps. You can also use a trick to create custom app icons to create a Home Screen that looks unique.
In Safari 14 the new Start Page replaces Top Sites. The Start Page has several sections, including your Favorites, Frequently Visited sites and more. You can customize the Start Page to act much like the old Top Sites page, while also including your Reading List and iCloud Tabs pages.
If you need a clock or countdown timer in your iMovie video, you can create one in Keynote and export it to use in iMovie. You can manually create each second as a slide, or use this simple script to add all of the slides automatically. In iMovie you can adjust the size, color and even reverse the overlay to count down or up.