They're coming, they are updating some much asked for items on the One, specifically items that Gamers in particular have been asking for frequently.
[url=http://majornelson.com/2014/02/05/xbox-one-system-update-coming-feb-11/]Read it here.[/url]
And there's more updates in the future. Good stuff!
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The battery life feature is definitely needed. If you have the play and charge kit then the controller will just shut off when the battery is drained, whereas with regular batteries you would lose rumble first which indicated you had about an hour or two left until the controller shuts off.