From the headline it sounds like Jelly Beans are now more popular than Gingerbread, but I assure you there is a mobile story here.
According to the Android Developer's Dashboards section, 34.1% of the Android devices that access the Google Play Store are running Jelly Bean (versions 4.1 and 4.2).
Obviously this is a huge step forward for the Android platform, since it has often been criticized (both by consumers and by its competitors) for its severe operating system fragmentation.
It's important to note how Google measures these numbers, however. This counts devices that access the Google Play store only. There are millions of phones that make use of the Android OS that are not part of the Open Handset Alliance, and therefore do not have access to the Play Store. Many of those phones are likely running much older versions of Android.
Nevertheless, Google has done an excellent job of closing the fragmentation gap over the past twelve months, and hopefully they will continue to encourage carriers and service providers to push out updates.