Frank Nuovo, an Italian American, has been a leading mobile phone industrial designer, and a former Vice President and Chief of Design at Nokia... (wikipedia)
Now you mix personal and business life. It is not 9-to-5 on the road it is 24-7. It is about designing for 24-7 and for (merging) home and business needs.
Even business people have style, and so it's not just about pure functionality. We also have to feel comfortable,
The traveler wants to be able to communicate everywhere, and you never know what mode will be required,
If you are in an airport or an airplane, you need to be able to have a choice between voice or text communication for reasons of confidentiality.