There are included San Francisco bridge wallpapers also.
At first I was "ok" with the default wallpaper, but after using it for a day..I like it. 🙂
If the wallpaper reflects the overall philosophy of this OS, then I can see just using a similar concept as before in creating it, while just updating it a little.
Tested my apps and all work and it seems faster, including macOS looking better. No noticeable issues with the OS so far.
I did not mine L.G., but this tone down a little version is better suited for the Mac.
Look forward to release date. If the final is as good so far as the beta, then this could be one of the best first releases with minimal issues that I can remember.