Ask HN: What is current trend on Internet which can be use for nextgen startup?

Find something, figure out some way to require an internet connection and subscription fee to use that thing, then sell that thing as a service.

Tire pressure as a service. Coffee cup as a service. Toilet as a service. Locks, mail, trash, we'll have a guy come by and tie your shoes for you - no scratch that, Uber for shoes. Doesn't matter what it is, as long as you convince people that having you and your app do it for them is simply better.