I wanted to have a little visual blocker, too. Just a glass door is not enough. Visitors can peek through the windows to see if a person is available.

And I would add a red / green LED to the door knob which signals if you are free to enter.

The wall inside also serves as a stand for the (heavy) flatscreen and has a coat hanger. I think it adds a nice cosy touch to the office, you you come in an e.g. take off your shoes.