The device needs to be able to handle voice communications in some manner, whether it is through the carrier's sim or through an app like Skype, but the hardware (microphone, speaker, etc.) needs to be there.
For the camera, it would need to be able to work seamlessly with Office Lens, be able to stitch together panoramas quickly, and not subject clients to unobstructed views of my nose hair when on a video conference call. Do I need special portrait modes, ultra slo mo or other trick photography, NO.
If this is meant as a productivity, note-taking, designing, brainstorming device, then it needs to do those type of tasks better than everyone else.