I bet some developers already thought about it. Some developers would like to use full power of the Switch but get that extra power, it needs to be docked
As guillaime said.
Not extra power from the dock. The dock simply unclocks the system.
So you can run the same power in handheld mode. Your just have less battery.
And i doubt they woll make a game that can only be play dock. That would kill the system since its meant to "SWITCH"