Konsole can display images, as can kitty, alacritty, western, iterm2, etc. There's quite a few formats to do so dating back decades. This isn't new.
As for collapsing a command and it's output that's nice, but it's not exactly game changing.
Lastly, searching explicitly your last command for a term with context would be much better suited to the shell to solve as it'd be terminal independent. Wouldn't surprise me if under the hood it's a bash script that takes whatever input you pass to bash, execs it, pipes stdout to tee, which passes it to a text file storing output and the console's output too. Of course, you can always pipe it to fzf for a live grep with context if you have it set up right and remember to do so
I would agree just denying any advancements in favor of the "good ole way" is idiotic but nothing I've seen or that you've listed convinces me these are major advancements. Nor are these anything that couldn't be solved at the shells level or with supplementary applications. Nice to have, if it weren't electron or closed I would switch, but nothing groundbreaking
I doubt they're outright rejecting any idea of progress. They're likely just not convinced by what the fancy options offer