What if your browser's new tab page was a terminal? Based on Chrome OS's hterm.

$ brew install tabterm/taps/tabterm # homebrew formula, includes a LaunchAgent that starts tabterm on login

Or:

$ npm install -g tabterm # install tabterm
$ tabterm # start the daemon manually
TabTermServer started: http://127.0.0.1:7473

We recommend using your OS's tabterm package. If you installed tabterm via a package and are using the package's startup script, you are set! Just visit localhost:7473 and observe the shiny new terminal. Otherwise start the daemon manually using the instructions above.

• Install New Tab iFrame
• Open chrome-extension://pjjgnpjhedgolccfdplecmnapdjhlknm/options.html
• Set the URL to http://localhost:7473
• Observe your new tab page is now a terminal