It has HDMI?!
Its a phone, but its not a phone.
TheXperia Propacks a 4K screen, 5G connectivity, andheres the interesting bitan HDMI port.

Sony
The trouble is, its not good enough, cheap enough, or focused enough.
Or rather it does, but not in any useful way.
“Dedicated monitors with similar or better features can be found for under $1,000,” says Hill.

Sony
The idea is certainly a tempting one.
But even this has a limited appeal.
“I think the key is 5G streaming.
“Again, though, that niche is not a lot of people.”
A dedicated camera might be better, but is it “better enough”?
“In the US.
And I do think photographers and videographers make sense as specialized customers to pursue.
Im just not aware of any products that have really succeeded in that goal.”