LTE vs. WiMAX: The next standards rivalry?

Standards rivalries have always fascinated me. The dynamics are quite surprising sometimes. Until I saw this item over at GigaOm today, I thought that LTE had won the battle for the next generation mobile standard. What this article points out is that this may well be true for the industrialized world, but it is far from the case globally. So are not going to converge on a single mobile air interface (to facilitate roaming) this generation?