It is surprisingly heavy. So heavy that it is definitely not going to become a widespread household device that everybody wants. The iPad is nice, sleek, and all that. But when you take it into hand, you immediately realize that it is just another computer, not a miracle device.
Most modern netbooks and tablets (iPad included) are powerful enough for average Joe. They can render sites, play YouTube and even run sophisticated games. Thus device weight and battery life are becoming the most important features and main differentiator. The iPad doesn’t have any significant advantage in these categories against netbooks. So the battle with netbooks is not over.