Online checkin, tapping the pole, q-tags, etc are all well and good if you're only flying domestic.
Even with carry on, I still need to queue and get a boarding pass for all my flights as I'm always heading OS.
No real difference to me except the queues are maybe slightly shorter.
All well and good, but most people will be flying domesticity where all that good stuff works and as you say you are benefiting as the queues for the desks are shorter.