I believe 3D printing & augmented reality glasses (Glassholes?) have had their fair share of prominence and are no longer world changing technologies.
Autonomous cars and trucks may start real world use beyond trials in 2018.
They have the potential to be world changing and with some painful impact on the employment of drivers.
Hyperloop may still need some time to become world changing. Trials will still continue and we will get regular updates on their progress lest we forget about this tech.
Robots & AI in the form of drones will be world changing in 2018. From their use in warfare with swarm tech, in entertainment with large public displays, extended use in manufacturing 4.0, supply chain logistics for ecommerce & more.
Blockchain will be aching for better use cases beyond value storage in Bitcoins. The Ethereum platform after the planned forks may lead the way in causing a tectonic shift with blockchain tech in 2018. Steemit will cautiously be adopted by various service providers. Fundamental issues with centralisation, abuse fueled by wealthy Steemians and reward pool plunder will have to be addressed expeditiously in 2018 for the Steemit platform to succeed.
Wow, a great and in depth answer covering all areas. Great, thank you.
You are looking at Ethereum evolution too, aren't you?