I am speaking from the experience after mgmt decided our IT dept must deploy iPads to 300+ mid level types company wide earlier this year.
For about a month, iPads at every meeting, out on every roadwarrior's trip (and dropped a few times, oops), always seen on desks in the office, etc.
Today... they live in drawers, under stacks of paperwork, "i forgot it at home". haven't seen anyone carry one into a conference room in recent memory.
And guess what our first major purchasing request of fiscal year 2012 is?
250 new laptops.
Go figure.