Hey I love the Amiga 1200 it's a great computer and it's fun expanding it.. I do animation and multimedia for a living. Even though it's very old technology it's hardly a toy..
I still love using deluxe paint's light table feature and the immediate feedback I get with pencil test animations. I can work on it like pencil and paper and I don't even realize it's part of the thought process (as I do when using photoshop and layers).
The Video Toaster (Amiga version) is still in use in many community access television stations and in many production houses (even though it's getting to be really old and everyone wants the High-Definition equipment..
So calling it a toy really isn't the case, but you definitely have to know the specific application you want it for.
