It depends on the SoC they're using, as some HW vendors are glacially slow in terms of releasing new kernels for their boards (NVIDIAAAAAAAA!), while some are better than others (TI) in keeping up with recent kernels. (Speaking of which, I heard there's a mythical 3.0 patch series for RX-51 board support.) The way things look, the ex-Nokia team is probably going to keep using TI OMAPs in their devices. Let's just hope they don't include stupid amounts of closed core components such as DSME, BME, libcal and the like.