Supreme court rules cell phones illegal to search if arrested

Story: http://gu.com/p/3qdnt

It seems today is when their handing out their rulings. The supreme court declared searching someone's cell phone after they have been arrested to violate the 4th amendment. The two plaintiffs brought the case after search of their cell phones led to additional evidence, then conviction. 

Justice Roberts went on to say:The fact that technology now allows an individual to carry such information in his hand does not make the information any less worthy of the protection for which the founders fought. Our answer to the question of what police must do before searching a cell phone seized incident to an arrest is accordingly simple – get a warrant.”

sounds like good news but it would seem to me that it's easy for police to get 'warrants'

How was this not written down in some statute before? Of course you can't just search someone's phone for the same reason you can't seize his mail.

Advocates are now worried about future rulings with personal information on the cloud or your e-mail in general. If the NSA can violate the 4th amendment why can't the local authorities? That's definitely something I would like to see them come to a decision about. At least they've got this right so far.