I'm not arguing against mobile, just... well... exactly what you say. It will never enter the pro market unless changes are made to the app and security models

I'm not arguing against mobile, just... well... exactly what you say. It will never enter the pro market unless changes are made to the app and security models that allow a user to admin their own device. It won't matter how powerful mobile devices get, or if they gain the ability to attach to external monitors, mice, keyboards, etc. Nothing technical prevents that.