I've been exploring different seating arrangements for groups, and still like the easy mobility of wheeled chairs, central gathering places, and ways to quickly create breakouts of small groups that can still see the teacher/board and report back without too much furniture noise.
This younger children's class (described by Amy Spies at TeachingChannel shows a nice option using the furniture at hand:
What students have to say about it is very interesting:
From the Steelcase video
With the flipped classroom, the projection multiplication may be a bit of overkill, but at least there is a strong move to put students' heads together.