Or just software that's been designed for touch.The VAIO Z Canvas does allow, and is designed to be used with, the keyboard detached from the tablet. Not being a person who uses those softwares I assume that would be for using hot-keys instead of specific buttons.
With a Surface 4 you would need either a Bluetooth keyboard of which there are many even ones made by Microsoft or a wireless USB Keyboard.
To me it's simply the wrong tool for the job argument. If you know you need key shortcuts etc, and you know the surface pro doesn't have them,then why buy a surface pro when there is something g like a wacom that is specifically tailored to your needs. this argument is nothing to do with it being pro or not.