Our students are digital natives they live in a connected world us as adults wanting just a table to them is just old world not moving on. Seriously get some of your students in front of these and say play with it and sure you will you see the worth.
As for paying 6k maybe not and need to wait for price to come down but they will like it did with iwb.
Problem with IWB is the technology was brought to old world technology so an electronic board with ability of an old whiteboard. Where with the interactive tables it seems to other way they have started with the interaction and then put it in a case which is a table.
Second forget about software at the moment that will come one reason the ms board will take so long to take off due to lack of educational software designed for the board Smart have lead on this with their own software.