Balázs Bertényi of Nokia is the 3GPP RAN Chairman, who recently oversaw some remarkably intense work to finalize "5G NR." That's otherwise known as Release 15. Guy Daniels of TelecomTV got clear answers to questions every pr person has been ducking: What is it exactly? How does it differ from LTE radio? The "two main elements" apply to the older definition of 5G, high frequencies only.
5G NR operates in higher bands, such as 28 GHz millimeter wave. There's a great deal of unused spectrum up there. Also More bandwidth in wider channels, up to 400 MHz. Few today have more than LTE's 100 MHz limit. But the U.S. 28 GHz band has ~2,000 MHz.