If DS was a fluke where's the "inevitable" handheld decline?

[tak13]

Conina said:

tak13 said:

Clamshell in a handheld console means dual screen though, you omitted that... 

It also means thicker device or less battery life.

the case of the second display takes space which could be used for a higher capacity battery and the second display need additional power from the battery.

                               

  Is that thicker than switch handheld device?

As for the battery thing, I think that  I can't  confute your claimings...