- Machine learning being used to increase accessibility; EA's recently-released blockbuster Battle Royale game Apex Legends includes a feature I've never seen before in any game; live transcription of incoming voice chat to text.. haven't relied upon it but I think it's an impressive first step in that direction

- Portable machine learning models, probably specifically real-time (24fps ~ 60 fps) computer vision image segmentation on mobile devices; this will go very well with the rising popularity of augmented reality frameworks

- Alternative non-monetary uses of blockchains, primarily for friend-groups or niche cultures - I've heard of private blockchains being used to broadcast locations of secret just-in-time-announced underground raves (in Berlin), so police can't just find out about it on facebook or something like that; this sort of replaces friend-of-friend word-of-mouth invitations and I guess you could implement fine-grained privacy/invitation rules this way

- Maybe Google Soli will become a thing - it likely won't, but it's still cool imo

- Software-defined radio and amateur radio in general

- 3D-printing, as mentioned by rolph

- Better IoT security practices, maybe IoT security frameworks, etc

- Better tools for circumventing digital censorship, thanks to the arms race between firewalls of increasing sophistication and those who want to circumvent them

- Increased recognition that data is bound by local regulation; Google in China, for instance, has to obey Chinese local laws. Perhaps we will also see increased acknowledgment of so-called "data embassies"

- Remote work and co-working will probably become even more popular

Micro generation and actuation is another avenue. 25 years ago when carbon nanotubes were a curiousity i could see world changing potential. we are now learning to produce nanotubes and nanosheets of graphene in deliberate fashion versus throw everything into the alchemical oven and sort through the mess for the good pieces. The potential to fabricate atomic scale objects and the potential to manipulate quantum phenomenon is growing tremendous, regarding energy generation, computation , communications, and weapons technology. that being said, warfare is going to become something of a nightmare never before imagined. TRUE AI with real world based experiential machine learning and the ability for these {devices?} to design and manufacture themselves is in its infancy, and may lead us into a realm of artificial consciousness. We have nearly cracked the code of life itself, with the advent of artificial unicellular devices, and have gone into directions in a perhaps irresponsible manner. CRISPR is not as new as its being made out to be. It was far to irresponsible to develop such tech 20 years ago but someone did it. It is only a matter of time before someone makes a tremendous mistake in these areas, similar to the early concerns that a large enough fusion bomb would ignite a nitrogen fusion event in the atmosphere and burn it all. the final nail in this coffin is particle physics, and high energy physics. we may get to a point of understanding the nature of spatial structure itself, and actually manipulate the fundamental structure of spacetime [for lack of a true descriptor] if so such things as quantum weapons [singularity weapons or string manifold devices] or artificial spacetime constructs may be feasible.