Input onto a tablet is clumsy at best. It is essentially a passive device. Yes, you can add an aftermarket keyboard and and an after market stand, but now you have a three part hacked together netbook instead of one that's designed with a keyboard and hinge from the get-go.
Further, tablets are a magnet for damage. A laptop screen can take localized damage and still mostly work. A tabket screen shatters. Plus the laptop screen is set back within the monitor component and the overall center of gravity means that a netbook is more likely to land on the keyboard side.
Finally, the software story is best for windows (web and native plus great management features), decent for chromebook, and worst for ipads.