Heat dissipation mostly, phones aren’t designed to shed wall powered thermals.
You can do this today with an iPad Pro with keyboard cover.
Also, pretty much nobody wants this. Most people who use work computers have them provided by the workplace. The workplace does not want the employee phones running the call center apps with customer data, etc.
I for one do not want any work data physically present on any personally-owned device.
You could do this on a work provided phone, so the data could be managed the same way they do on a PC. Also, BYOD is still a thing, so there's that.
Regarding heat dissipation, you have a point. But I think it depends on the use case, which is the reason why we also have laptops going from paper-thin under-powered models all the way to models requiring a forklift to move around.
I think many "office jobs" could be done within the dissipation capabilities of a smartphone. Most of my days are spent answering emails and typing away in a terminal over SSH. My geriatric iPhone 7 could probably handle that without issue.
Secure BYOD is mostly unsolved wrt most common/popular Android phones. (Windows is also “a thing” but that didn’t stop Maersk or whoever from getting ransomwared, did it?)
Most serious orgs prohibit BYOD unless you are on Pixel or iPhone where MDM can actually work securely. There is no meaningful way to secure corporate data on an employee-owned Galaxy, for example.
It is the rare corp that can do BYOD securely. The best practice is issuing corporate iPhones to all staff with universal MDM and keeping all corp data physically separate from personal devices.
This also saves your employees’ nudes in a subpoena/discovery situation during a civil action against the corp, which is all too common.
I don't know about Samsung, but even some random Chinese smartphones pass the MDM checks these days. I had Unihertz Atom XL as my BYOD work device for quite a while with no issues.
I hear you, but ubiquitous "phone booths" where you can have a quiet call or type up an email with a physical keyboard and large screen would be amazing.
Don't let the decline of the telephone system fool you, when phones booths were widely used they were not disgusting toilets that you found in the late 90s-early-00s.
You can do this today with an iPad Pro with keyboard cover.
Also, pretty much nobody wants this. Most people who use work computers have them provided by the workplace. The workplace does not want the employee phones running the call center apps with customer data, etc.
I for one do not want any work data physically present on any personally-owned device.