I know that, but connecting a keyboard or mouse to a phone is useless, the big screen is crucial.

And while there were options to do that in the past, all were one-offs and needed an extra port. So I guess we both agree about the capabilities that exist(ed), but that is exactly the reason why I posted my "In an ideal world" wish. There is no solution today as far as I'm aware. Which is a shame, given the power that these smartphones have.