I think the majority of users of laptops don't bother with an external monitor - the number of people on here who do probably aren't representative of the wider public. It might also explain why Apple got out of the display game.
Having got used to TouchID on the MBP in particular, its very much missed when using the laptop in clamshell mode, as is the touchbar. I'm hoping that the new iMac will drive the need for a new magic keyboard with touchid and ideally a touchbar built-in as well.