I suspect the real reason is just that mobvoi is still developing the app interface. With such revolutionary new features it's understandable that they would want to get the app as perfect as possible before release for maximum effect. I decompiled the last few APKs and there is a reasonably significant amount of new arty content being added with each new release - the most recent being on 22 Dec. Having said that - am still hopeful that we'll get an announcement very soon.
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