My first guess is that it's an Ubuntu fork with the Unity interface instead of the Gnome Shell. But the logo and icons on the Twitter page + the "Remix" inside the name suggest it may be an multimedia editing oriented distro?
https://web.archive.org/web/20070429002528/http://www.ubuntu...
I'm not sure about the current legal status of such use of the trademark, but I hope this explains what is usually meant by "Remix" in the context of Ubuntu.
"We recognise and encourage the concept of a “remix.” Remixes are derived versions of Ubuntu, and it is intended that any software and hardware certifications will apply to a Remix. Therefore the changes from official Ubuntu product must be minimal to be permitted to use the Trademarks. These changes can include configuration changes through the existing Ubuntu configuration management tools, changes to artwork and graphical themes. and some variance in package selection. In general, a Remix can have applications from the Ubuntu archives added, or default applications removed, but removing or changing any infrastructure components (e.g., shared libraries or desktop components) will result in changes too large for the resulting product to be called by a Trademark. Note that if the nature of the product's divergence from Ubuntu changes, the Remix naming and Trademark use may no longer apply."
"Therefore, if you are creating a derivative of Ubuntu, you may use the Trademarks in association with the software product provided: [some conditions]"
Remix is (I think) an updated, forked version of Unity that is now being maintained and advanced with the latest versions of Ubuntu. This is particularly exciting for me and other Unity lovers because I pretty much only use Unity as my DE. I have been manually installing it as a replacement for Gnome and this update is very exciting. I think Unity is a lot better.
I mean, is it really different from the Unity version you can still find and install from the 20.04 official package repository? The problem I see with this is that you have to trust a binary distribution (not just the package, but the entire OS) bundled by a not well-known team.
For me, it would be great if Unity could be maintained and developed just like any other desktop environment (i.e. XFCE) which is completely open source and you can get from your command line just apt'ing it in vanilla Ubuntu.