I think adding a new device or two that seems futuristic to us now would be cool.
I'm not as attached to which era a new TV series would be,
If the next Trek TV series is set before 2371 when VOY launched then the canon won't be correct as VOY would have had the technology.
This is where canon is gonna get a little tricky. The JJVerse nuTrek canon
may allow them to do anything they want in series6 Trek TV.
Unless there is some time travel similar to VOY where the mobile holo-emitter, or 'mobile emitter', was a piece of 29th century technology that the Emergency Medical Holographic program was able to use after that episode for the series allowing the EMH (The Doctor) to become a full member of the crew, go on away missions, and rise in Starfleet rank which led him to commanding Voyager more than a few times as the Emergency Command Hologram (ECH).
I really liked how they were able to use that sole piece of technology in VOY for some major plot points by repurposing its technology to become an energy source, a data storage unit, amongst others.
Speaking of EMH other than as of 2376, there have been four versions of the EMH, called Mark I-IV I wonder what future EMHs will be like? Will the mobile emitter return?