Oh, and just for reference:
"Within the marketplace, WiMAX's main competition comes from existing, widely deployed wireless systems such as UMTS, CDMA2000, existing Wi-Fi and mesh networking.
In the future, competition will be from the evolution of the major cellular standards to so-called 4G, high-bandwidth, low-latency, all-IP networks with voice services built on top. The worldwide move to 4G for GSM/UMTS and AMPS/TIA (including CDMA2000) is the 3GPP Long Term Evolution effort. However, it has been noted that the likely performance difference between WiMAX as it stands today and LTE when it is eventually commercially available in 2–3 years time, will be negligible.
LTE is expected to be ratified at the end of 2010, with commercial implementations becoming viable within the next two years."
source: http://en.wikipedia.org/wiki/Wimax