Key Lime Pie, which hasn’t officially announced to public, is the successor of Jelly Bean. Some people guess that Google X is the Motorola X. But, the benchmark score is not good enough for a smartphone with Snapdragon 800 chipset. However, there’s a possibility that the score is for non-optimized test.
Android 5.0.1 Key Lime Pie most likely will be introduced at Google I/O event held in May 2013 as there are many vendors haven’t finish to update their devices to Jelly Bean. Therefore, Google X is likely to be introduced in August or later.