Futurology

Call me a pessimist but 5g is already stupid. I'm using a device that can already reach 4g lte speeds of 500 mbps using mobile data, and empty my entire data plan in less than 15 min if I were downloading a file at those speeds. Why do need speeds faster that gigabit on a device whose data plan won't allow anyone to benefit from this faster technology? I get that this might give each tower higher bandwidth and thus allow for higher bandwidth and bigger data caps, but I've had 5g for half a decade now and it seems like nothing has changed.