It’s not even another way to connect our phones. It’s just a new standard for doing the same thing 3G and 4G cell networks did. However it does do those things with some technical differences. Perhaps the most significant overall difference is the major increase in speed and capacity. It may start to become the main way people get Internet access. There are various other concerns that have come up too, because that new capacity and the new protocols has some possible security risks (e.g. because malicious uses will have access to more bandwidth than before, which could mean more powerful DDOS attacks than ever before, to mention just one concern). Other concerns are about how the new protocol reaches into new frequency ranges, which may cause new interference issues with other technology (avionics and weather radar are two examples). And of course the ongoing concern that dumping more and more radiation around may be unhealthy. Etc. Some of the hype and use of terms such as “game-changer” are also part of marketing and money-oriented enthusiasm about once again selling everyone a whole new set of “must have” tech that they already have (but not the latest version, etc).