They've already announced a game that requires the touchscreen (and thus cannot be played while docked): http://www.eurogamer.net/articles/2017-02-27-nintendo-s

They've already announced a game that requires the touchscreen (and thus cannot be played while docked): http://www.eurogamer.net/articles/2017-02-27-nintendo-switch-has-its-first-touchscreen-only-game http://www.eurogamer.net/articles/2017-02-27-nintendo-switch... I think these will be uncommon, but they will exist, because they can.