That's the common misunderstanding about these speeds.
10Gbps is divided by all users/devices connected to a given base tower. Devices are receiving at 10 Gbps, but only for vewry short timeslots - TDMA means "Time Division, Multiple Access". So if you're the only user connected to the tower, congrats, you have all slots to yourself and can get those 10Gbps. But in a normal city environment there will be thousands of devices, with hundreds sharing a frequency band at any given point - so you get Mbits, not Gbits.
The importance of ever-higher speeds is not about downloading faster, it's about supporting more people and devices connected at the same time.