Rumors of the new iPhone are making their way around the web (see Business Insider). They are good looking and would cause iPhone enthusiasts to wish they had them... but the color alone wouldn't cause people to upgrade: There is only one Apple rumor I care about (and I wrote about this in December): bring on the Apple Tablet.
Think about it:
Apple Tablet = Netbook + Amazon Kindle + App Store + iPod Touch
People are gobbling up netbooks for $400-$600 and the Amazon Kindle runs $359-$489... wouldn't a $500-$750 be a success? I would pre-order instantly.