I wholeheartedly agree with everyone. I don't think mobile games can ever replace handhelds because they're just time wasters. There are a few games I like to play but more often than not they're pretty lacking in features. As much as I don't like the games of today in general, the handhelds do perfectly what they are designed to do and now they can do a little extra. What I mean is on your 3DS you can play YouTube.
And at what point will handhelds allow you to surf the web.. and then make phone calls.... I think if PC gaming can exist with consoles, then mobile can exist with hand-helds.. but i do think that handhelds are going to start blending into being more like tablets.