Old news is old.
Yes, we know, that we need a killer/hero app, everybody who is long enough in the space knows.
I do agree with the article but the problem is how and who will be able to make that hero app which if it was easy, it would have been out there already and yet no signs that I could see of at least...
I disagree. Technology is not always about complex solutions. Technology is often about recognizing, what people need(or think to need) and good PR(or luck).
Taking the Uber-example from the article. A decent tech-team could easily build the basics of Uber in a few months. In hindsight, Uber is a pretty obvious thing, but still somebody had not just to think about, but also developing it(I also have a lot of ideas, which might be huge, but just don't have the guts to invest time and money to actually develop them).
So, the bitcoin killer/app could already be developed in someone's mum's basement, there might even be an introduction of the project in this forum and everybody is just like "Nah, that won't work/Nobody really needs that" and six months from now, with the right press coverage, Millions of people use it(and everybody on this forum will tell you, that the idea was obvious). Could be, might be.