At the present moment it makes no sense, unless one wants to throw away money. The specifics/bands could change, and you risk buying a prototype that isn't even fully compatible with the final thing, lol.
Also, the (main) purpose of 5G is minimizing latency and at the same time decongestionating the mobile networks. I live sufficiently distant from Venice (historical centre / touristic area) that is the closest city/area where towers might get overburdened, and most of the time I'm connected via wifi hence if I have to do something that requires ultra-low latency I'll probably wait to reach my destination (and most likely I won't be doing it with my phone anyway).
@Stereoguy The problem with current mobile networks is that the same medium (allocated electromagnetic spectrum) is being shared by an increasingly number of devices, especially in crowded areas such as big cities you can have thousands of devices connected to a single tower, and it's not that you just add another tower in the nearby and solve the issue. And at the same time, wireless networks suffer from high latency (i.e. the time one single unit of data takes to be transmitted from an end to another and viceversa is *much* higher and much more unstable than it is in a cabled or short ranged network like for instance the wi-fi you have at home). Most people and MVOs seem to care only about the [i]throughput [/i](i.e. the "Mbps", how much data can flow through the network in a conventional unit of time) because that's the datum they strategically choose to push in the marketing, but the truth is that you'll have a terrible experience even with a 1Gbps (1000Mbps) network if the latency and congestion are high and increasing.
5G aims to solve the issue by adding a lot of mini-towers especially in crowded areas (think of them like the wifi router you have at home, with more or less the same range and performances), so that there'll be less devices simultaneously connected to each tower, and the distance between every tower and the connected devices is much shorter as well. You'll also save battery power since devices will need to transmit on much shorter distances as well.