The trouble with most "best tech" lists is that they're a shelf of things that need charging. These six don't have that problem, and not because they're austere. Each does one job, finishes it, and gets out of the way.
Sound that folds flat
A speaker earns its space by being wherever you already are. Folding sounds like a gimmick until the first time you pack it — and the fold doubles as a stand, which quietly removes the daily business of propping a phone against a mug.
Your phone is already the computer
This is the one people don't know exists. A phone has the processor, the screen and the connection; what it lacks is somewhere to put your hands. Add a folding keyboard with a touchpad and a hotel desk becomes a workstation — email, documents, the long reply you'd otherwise leave until you were home.
The second screen that travels
The other half of working somewhere that isn't your desk. A laptop shows one thing at a time; the work usually wants two, the document and the source. An extender that clips to the lid returns the second one without a monitor, a stand, or a wall socket.
The test isn't what a gadget can do on the day it arrives. It's whether you'd buy it again after a year of owning it.
The one that ends a standing order
Canned air is the odd product you buy again and again, throw away entirely, and never once think about. A cordless duster is the opposite bargain: one purchase, a charger, and nothing under the sink.
When the machine stops being the project
3D printers used to be the hobby — levelling, calibrating, tuning, and somewhere in all that, printing. Machines that arrive ready to use change what you're actually buying. The printer is no longer the project; the thing you print is.
An excuse, sold as a board
A Raspberry Pi isn't really a gadget. It's a reason to build something on a Sunday. Buying it as a kit matters for an unglamorous reason: it removes the evening you'd otherwise lose to sourcing parts before starting.
Six things, six jobs. Nothing here needs an app to finish setting itself up, and none of it will be obsolete by spring.