A notable mention is https://ubports.com/en/ which is different from postmarketos in a sense that ubports uses old kernels with heavy patches. That means: good support for things, but difficult future.
PostmarketOS uses the newest kernels and tries to integrate their patches into mainline kernel, so that the reliability is maintained with all kernel developers.
Here’s a demonstration of Waydroid on FuriOS and the accompanying blog post from 6 months ago. I’m obviously not a fan of X (Twitter), but the video shows that the app works in the Android container.
Yes, I also hope to see the price go down.