VZW has simlar plans.
Maybe it stands for Reluctant Adoption of Incompatible Devices :-)"
The band situation in the US is flatout stupid, but yes rapid. Verizon Wireless has nearly 100% 4G LTE coverage, and Sprint, AT&T, and T-Mobile probably have 90% of covered population covered by 4G LTE (although by area they have much less 4G than Verizon Wireless.) T-Mo plans to go straight from 2G to 4G LTE in the rural coverage areas. There are many MANY 4G devices, all 4 of the "big 4" see quite heavy 4G usage these days.
Anyway, this is more or less VZW's plan too.... they have 4G LTE. They plan to shut down 3G EVDO data around 2020 (this 3G technology is data-only...) but keep 2G CDMA 1X (voice, SMS, 144kbps data) up indefinitely, for use of whatever devices don't support VoLTE yet, a fallback if you are out of LTE range, and for M2M.