This is what I imaging would be a perfect set of devices:

  1) a smart watch can read notification, messages, listen to music, podcasts, audio books, receive and make phone calls, voice chat, group chats;
  2) a eink device to read books, browse internet for news (hackernews for example), emails;
  3) game consoles or pc + project + vr for entertainment;
  4) a tablet with keyboard for work (with access to servers in cloud) and netflix, youtube.

I really don't want to carry a phone with me.. it is big, attention seeking and to be honest, not very useful.