Back in the day, people would just tie a bandana to a stick and call it luggage. Today, we have smart luggage, which seems like a real improvement until you realize you're not allowed to bring it on a plane. That's becoming more and more the case as more airlines ban and limit passengers' ability to use it.
The newest additions to that list are United Airlines, Hawaiian Airlines, and Allegiant Air. They're joining the likes of Delta Air Lines, Southwest Airlines, American Airlines, and Alaska Airlines, plus international carries like Qantas, Air Canada, and British Airways. The new policies will be enforced starting January 15, 2018.
These newfangled bags have features like USB chargers, GPS tracking (no more lost luggage, in theory), Wi-Fi hotspots, and a whole host of other features that make the case that the future is in fact now.