"640K ought to be enough for anybody." - Bill Gates 1981 (or supposedly.
So there is a long way to go in all of these areas, and there is even a longer way to go in adjacent areas, and we're not even touching all the other things startups can do - you know - the other 95% of the economy?
Healthcare, biotech, materials, energy, construction, auto, food services. You know 'everything that's not your iPhone'.
If VC were structured differently I think we'd have a solution to hair loss and possibly sagging skin by now. Those two markets are worth 2x Google and Apple put together. People will pay for their 'youth' before they give 2 cents for a mobile phone. As the tip of the iceberg.