The timeline for LTE has been adrift, letting WiMAX gain footholds in European markets. Now that the supporters of LTE have ramped up their efforts the required standards should appear late this year, instead of 2012 as previously planned. This move will stop WiMAX gaining traction, and the race as to which will become the winner is much closer, if not over.
These trends are all on different timelines but are being driven by the need for operators to reshape their business models within mature markets. Some will be short-term, others will take much longer to implement.