Because it has 3G? Because it's HD? It might be faster? (certainly to switch on an off) You might find it more aesthetically pleasing? More gaming ability on an iPad? You might prefer the intigrated keyboard/mouse? I don't know dude. I'm not anti every other device in its class just because I'm not anti Apple.
My old man bought one and he finds it much easier to use than a laptop/computer/netbook. As a result for the first time in his life he now uses email and can surf the net. Of course he could do this on a netbook but the ipad is much easier for him to learn.