Honestly? my guess is that they mention it suddenly because they didn't improve many things so they have to make extra points to sell you the upgrade. Heck, you could argue that android is a downgrade since it will definitely hit the battery life, and the zx300 UI is already great/perfect for many folks. I remember them mentioning "no wifi because interference and noise levels", "no android because battery life", "sony's UI because ease of use"... wondering what happened to that, haha. It might be my cynicism talking but imho most of sony's claims sound like snake oil nowadays, hah (not only in their audio disivion). If it sounds better than the zx300 great, but all the marketing talk in the world is just that, give me proof and my wallet might bleed again, lol.