I think the iPad is good for what it is - a personal media player. It is NOT the laptop/touchscreen hybrid next generation technology that we had hoped for. 
I suspect as a PMP it will see wide success, but there is still a massive void yet to be filled with a proper touchscreen laptop that can accommodate all of our computing and graphic needs. We can only hope another company steps up to the plate and delivers something truly revolutionary. Not just another iPhone/PMP.