Not sure this should count being that it is not available
Nothing, and maybe that's quite alright.
Lumia 1020 represents probably the biggest leap in phone+camera tech we have seen. Given the ubiquity of this kind of tech, to make such a leap is kind of a big deal.
That this could be even considered as the tech highlight of 2013 shows how little has happened. The camera in that phone wasn't a technological leap in any sense, it simply made the trade-off of 40MP pixels vs massive shutter lag, less light sensitivity, more noise and slow processing. Some of these compensated for in software, but the images it produces are not that different from every other modern smartphone.