basically i'm using my ipad for 2 main purpose:
1. my part time study. put all my classroom slides inside the ipad so i dont print it and save environment. ehem.

2. for work. as a marketing guy, i use the ipad to do presentation to sales guys, shows application video to customers, check tools functionality compare to schematic diagram in ipad, put the price list inside so i dont need to bring the thick price list book anywhere... the list is unlimited....

but still on editing part on Powerpoint/ excel, still need laptop for it. ipad makes it easy for me to show the file, not to create it.

just my 2 cents.