Once everyone realizes every practical use of their AI technology is more than adequately met by conventional code, and that there's no grand breakthrough into general artificial intelligence coming anytime soon, the hype cycle will end.
I'm all for skepticism for the current hyperbole, but there's no need to be hyperbolic in the other direction.
There are some applications in which deep learning really does work better than alternatives. The 2018 Gordon bell prize, after all, went to a team that did deep learning on Summit for climate analysis.
There is a nontrivial list of applications that you would have a hard time convincing experts that they would be better off with conventional code.
A better question to ask back then would have been "which large business will depend on the internet in 2015".
Note that the internet in 1995 was pretty bad (in terms of applications and from technical point of view), and the hype led to dot com crash 5 years later. Yet it's hard to overestimate the importance of the internet in today's world.
So if that technology were to catch on, a pedant could argue that most computing workloads really are machine learning.