Group work would go much quicker if multi-touch table computers were more commonplace. Instead of having to email documents around for review, we could all sit around one table and point out bits that need correcting, then do it right there. Instead of having to print large drawings for discussion, we can just look at it all together around one table. I can imagine teams of about four people using one table as a common work area by default, and I'd love to see how that works out in practice.
Mokalus of Borg
PS - We would need to rethink how computers relate to our work.
PPS - This all assumes the table is powerful enough to keep up with four people.