I'm not saying doing it on a phone is what makes it novel.
The minimal and smaller but proportional bar that moves and then fades out does seem novel to me in total regardless of prior bars that were minimal (windows has had a setting that allowed 1 pixel bars since xp or vista at least), smaller (my understanding is that smalltalk's original bar was not full length), gave a sense of proportion (pretty sure BeOS had a setting for this) or disappeared (I'm sure there's something).
Analogously there could already be robots that ride horses, robots that chew bubble gum and robots that do the macarena but we can still patent a new robot that did all three of those at the same time.
The minimal and smaller but proportional bar that moves and then fades out does seem novel to me in total regardless of prior bars that were minimal (windows has had a setting that allowed 1 pixel bars since xp or vista at least), smaller (my understanding is that smalltalk's original bar was not full length), gave a sense of proportion (pretty sure BeOS had a setting for this) or disappeared (I'm sure there's something).
Analogously there could already be robots that ride horses, robots that chew bubble gum and robots that do the macarena but we can still patent a new robot that did all three of those at the same time.