The Jeremy Paxman v Michael Howard interview that Martin referenced can be viewed on YouTube at: https://www.youtube.com/watch?v=pyqnu6ywhR4.
The tldr version of the 2017 trends can be found at TechCrunch, which includes a bullet list of key points and a highlights version: https://techcrunch.com/2017/05/31/mary-meeker-internet-trends-2017/.
A good demo of Hololens can be seen here: https://www.youtube.com/watch?v=ihKUoZxNClA
The official Microsoft page for Hololens is at: https://www.microsoft.com/en-gb/hololens.
This video demonstration of a Hololens game demonstrates Ross' point about the relatively low-quality graphics: https://www.youtube.com/watch?v=29xnzxgCx6I.