So everyone needs a 27” Display with a second 24” display next to it?
Do on the road sales teams need this as well?
Sounds too bulky to carry around
Ah, another one of your strawman arguments, I see. No, a MacBook weighing just two pounds would most likely be more than adequate for the job, if an under one pound iPad wouldn't do it VPNed back to a full desktop computer, with BOTH displays and having complete control of it. However the view might be a bit tiny. . . so then you might want the iPad Pro with its 12.9 inch 2732 x 2048 pixel screen. Or, alternately, you can hook any of them up to a miniature video projector and display them on the wall at whatever size you need to show your clients. They are all capable of doing that. . . in either HD or even 4K.
However, most sales professionals are opting for the iPads.
You don't pay much attention to what people answer to you, do you? All of this has been asked and answered. . . and essentially covered in the article and other sources on the movement of Apple products into business, if you bothered to read them.