It is an IBM laptop but has a pen so the students can write on the screen instead of just typing on the keyboard. This can be projected on the wall if you have a wireless projector. I will be trialing one in my Kindergarten classroom next year.
One example for using the tablet computer in kindergarten is to use Windows journal which comes on the tablet. A teacher can find an image they want to use, select print, print to journal, and then they can use the pen to write or color on the images. We have found this to work well, Ink annotations in word are also used.
Budgetary restraints at our school have meant that in the early childhood we will not be getting the whiteboards, but I believe that with the tablet and the wireless projector I will be able to project the work on the tablet onto the wall.
Agree about a IWB (Interactive white boards) with younger children, another tool to explore if a IWB nor a tablet computer is possible is one of the wireless teaching pads. The IWB companies sell these names like the airliner, schoolpads, etc. Still the board with the younger kids is wonderful!
My school always encourages the teachers to use technology (using a laptop, browsing information through internet) in the classroom. I believe it can improve the learning process. Unfortunately, I can't trial it in my class because the school can't afford one computer for each class. So far, I just use a whiteboard in the class.