I love this idea!! It is probably more feasible now too with technology getting more powerful but smaller. I was just thinking that would be necessary because keeping your things secure might be a problem.
I had a professor that carried a small suitcase to class, really it was smaller than a suitcase, almost the size of a toolbox. He would prop it up and open it, and inside he would pull out a little reading lamp and papers. it was cool because it created a super small working space that immediately had a sort of presence and identity. It was a little intimidating, a little storybook-curious, and a little inspector gadgety. I liked it!