Its only toy when you play with it! :)
I have an iMac, a Macbook, a 11.6" Macbook Air, and I had an original V1 iPod (my wife has an iPod Touch). That's in addition to a couple of Windows laptops, and a Windows desktop.
You'd think that I'd have an iPhone and an iPad, but I have Desire HD and a Galaxy Tab.
Whilst I'm not keen on the Steve Job sanitized view of the world, my reasons for having a Tab over an iPad are simple - for *my* needs the iPad is too big. My Macbook Air isn't that much bigger and heavier than an iPad and it is much more versatile - it cost twice the amount though, so that's not a dig at the iPad at all, which is a great device!
My Tab on the other hand is the perfect size and weight for *my* needs - it's also just as functional (IMO) as an iPad. That's not to say that it is better than an iPad - just that it meets my needs better than an iPad would.
Some would say that it is a toy, but for me it is an essential business tool - when I'm out and about I can use my Tab for a variety of tasks including remote desktop to various servers I need to attend to, Citrix served applications, viewing and creating office documents, and ad hoc web browsing.
When I'm not working, it serves as a media player (and server), games machine, rss reader, occasional ebook reader (only when I don't have my Kindle with me!) amongst other things. It's also the tool I am most likely to use a night to browse the web, which used to be a task for my Macbook (not the Air, that's a business travelling tool).
Yes, I could do much of this on my Desire HD, but the simple facts of the matter are that the Tab has almost 3x the screen area of the Desire HD and a higher resolution. That is a key differentiator for me. In fact, I hardly ever use my Desire HD anything other than a phone these days because for most purposes (other than phone calls) it is more comfortable and convenient to use the Tab.
So for *my* purposes, it's an absolutely fantastic device - and it fits in coat and jacket pockets, which is a massive win for me.