This looks nice but nearly identical to Obsidian. How does it differ from Obsidian's features?

I own a Kindle Paperwhite (last gen, relative to this new one) and a Kobo Clara BW (purchase in the last 6 months). IMO, the Kindle is the premium e-reader when it comes to look and feel. It's just a fantastic experience. The issue is Amazon and how even if you want to put your own purchased ebooks on it, you have it send it through their servers. That tied with a few other privacy issues over the years led me to also get a Kobo.

The Kobo can run in a fully offline mode (called "side-load mode" or something like that) and I can transfer my ebooks directly via USB. I use the Kobo most of the time now since most of my reading lately has been independently published ebooks, but I still use the Kindle for books I purchase via Amazon directly.

With all that said, I personally think the Kindle Paperwhite is already the perfect size. It fits snuggly in my back pocket and strikes the perfect balance between screen size being large, but not too large to hold for my average male hands. I'd be a bit concerned about the size increase for my personal use case, but Amazon does a great job with the Kindle in general so I'd like to see some reviews.

As for the new Colorsoft, I'd really like to see some reviews. The color Kobos that came out earlier this year got some mixed reviews for colors, but I'm not sure if that's just the nature of color e-ink or not.

Konsole (part of KDE) does too

Does anyone have a screenshot or video of it in use?

Being limited to windows makes it difficult to try out, and understand what it brings over existing debugger options.