We don't promote the weight because we aren't yet at the stage of integration where we can promote it at. However, you can expect it to be around 800g front+back combined, so around the same as an Index.
In our experience, a balanced headset is more important than a light one.
I am excited about the possibilities this opens though. Will it be more convenient than a terminal emulator running tmux? Maybe not for me, but I could see people who deal with more visual assets like game developers using this.