5G SUPER SPEED

The world we live in is inspired by new inventions and innovations. Well all of us dream of browsing and downloading at high speeds..
Imagine downloading at speed of 800mb/s. Well this seems a fantasy which it really is.
Such speed is theoretically possible like 3G and 4G which i bet are only possible in experiments but not available to users. Looking at a real practical example USB 3.0 at a speed of 500 Gbs ( approximately 500mb/s) the highest speed i have archived is 50mb/s ,10% of theoretical speed. Before they even introduce 5G ,they should first actualize what already exist.
They should actually work on compatible high performance hardware. Let imagine of a server capable of 100gb/s .this means it can serve around 10 5G connections at the same time. Most likely for such a server there will be More than 1000 clients per second meaning they have to share connection hence slow connection. Or in case of PTP connection which we are used to when downloading large files like movies. Even though you have 5G and the guy on other end has 2G be guaranteed to get speed lower than 2G for your 5G.