I'm probably a bit more positive to TUI type applications than you (and don't care about theme matching, docks, or notifications), given e.g. my editor runs purely in a terminal (and I'm writing a new terminal...) but I think we sort-of agree when you say it's just a thinly disguised GUI.

While I think it's impressive how good they've made it look, for me the point of a TUI is for it to be simple and pared down. It's nice if it looks good, but I want something keyboard driven and command focused rather than UI element focused. I'm not sure who the target group is here. Are there enough people who love to work in a terminal but still want their apps to look like GUI apps?

EDIT: From elsewhere on the site, it seems like they're trying to target people who would like to write GUIs, but find writing GUIs too hard, and that the TUI part is just a starting point. I'm ambivalent of the chances for that to succeed, but who knows.