Whenever anything game changing comes along, like EDOF, players tend to adopt it in a fairly consistent pattern. First, a guy on the fringes, followed by the market leader(s), and, finally, the guys in the middle if they haven't been put out of business by then.
I did a little DD on Kyocera. It was formerly part of Qualcomm (think CDMA) and so probably fairly tech savvy. It is aggressive, as it just merged with Sanyo, and together they probably have only about 7% of the market. I consider Kyocera to still be something of a fringe player. As such, it has little to lose, and needs to be aggressive if it wants to be one of the three or four cell phone manufacturers that are still left standing when the dust settles. Nokia will gladly let Kyocera go first, and then weigh in if TrueFocus is a big hit. The others will follow sometime after that ... if they can.