We need to keep in mind 5G NR (new radio) is not a frequency or limited to any one frequency. 5G NR is the next generation technology language which is used to send higher amounts of data and creating much more bandwidth along the same frequencies already being broadcast, as well as new frequencies. So rather than adding more lanes to the freeway, just make the cars much much smaller. Now you can fit many more cars on the road. This of course is an overly simplified analogy.
5G NR can be used on any frequency band, just like 4G LTE. the interesting things about these new towers going up is that they are broadcasting millimeter wave (mmWave) frequencies. The higher the frequency, the faster the data. Super fast! However with every pro comes a con. Higher frequencies are subject to more interference. In this case mmWave signals have a hard time passing through many objects, including glass and even your own hand can slow the signal down. It pretty much needs line of sight. Higher frequencies also do not travel very far, hence the need for many of these towers.
MmWave 5G NR will be best used in highly congested areas where large amounts of people gather, such as festivals or sporting events, or in this case theme parks. But once you go inside a building you may lose the mmWave signal and have to revert back to a lower frequency signal which don't have as quick speeds (which will still be much faster than 4G LTE). Real world speeds on mmWave can reach well over 1Gbps. This is super fact and pretty much pointless to the average person, unless you want to download a movie to your phone or a Spotify playlist in a few seconds. However, this will be very beneficial for capacity reasons. Slow everyone down to lower than 200Mbps and you can have everyone feel the need for speed all together, still faster than most public wifi hotspots! The days of having full bars but still very slow speeds may be over with 5G mmWave (if it's working properly).
5G NR is also being broadcast on mid and lower band frequencies across the nation. Lower frequencies have the advantage of being able to travel long distances from the tower and have higher building penetration capabilities. However, with that pro comes the con of not being as fast. Mid-band frequencies have a nice balance of both worlds. Most 4G LTE bands are mid-band and are what we are most using now for our day-to-day. Mid-band 5G NR speeds are still fast, pushing well over 500Mbps on decent days, and 5G NR on lower bands can bobble on the lower end, feeling more like good 4G LTE on mid-bands.