Apple's 2012 World Wide Development Conference kicked off today. And overall, the news was impressive. If you have $2199 to spend on a laptop, the 2880 x 1800 retina display of the new MacBook Pro might interest you. Meanwhile, iOS is getting upgraded with anti-Google technology — like maps and improved Siri responses. Yet, I was most excited by a fairly minor announcement. OS X Mountain Lion is releasing next month... for $19.99.