Mail, for instance, now lets you specify VIPs such as bosses and spouses, then view their messages in a special inbox.

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The square glows red, yellow or green depending on how much electricity you're guzzling, and you have the ability to specify what qualifies as acceptable usage.

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You'll be able to specify cuisine too (look out Yelp) although results in a city as big as London were hamstrung by a low number of listings.

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