I'm reading this article on my ZFold3 and I'm hooked on the big screen experience. However Samsung will not get my bucks for the 4. My mandatory upgrades were not included; better camera would help, but the deal killer is no silo for the S pen. They fit it in the New Ultra, in my wife's Note but didn't bother with the 4.
There's a small crack in the screen fold already and I am very careful about what is used on the big screen so I'll have to hold out for the 5...or maybe another brand?