This is also often the problem with newer mobile phones. I'm all for multi-function devices, but the problem is always that say with a mobile, it's great for making calls, but a camera phone has a crap camera.
I don't want a phone that takes pictures, I use my much better quality cameras for that. I just want a phone that makes calls. Multi-function devices will only be good when every component is a usable one, instead of a gimmic or an afterthought tacked onto another device.
(MP3 players and cameras currently part of cellphones for example).
Perhaps what Dan has just said could be explained as if you try and do many things, you run the risk of accomplishing none of them effectively, and just fall between many stalls.... 'Jack of all trades, master of none'