Why are handhelds often seen as inferior or not as important as home consoles?

[craighopkins]

daredevil.shark said:

Inferior in terms of power. Obviously.
Inferior in terms of users demographic. Kids toy (general assumption).
Inferior in terms of games value. Not AAA games like home consoles.

I would add lack of a big screen and surround sound with great bass. A big screen allows multiple people in the room to be immersed into the experience and surround sound makes it more immersive too