While this rumor has been around for a while, it seems it might actually be true. The most exciting rumor is the Ivy Bridge processor that will make the machines faster and more efficient. As usual though, only time will tell if these rumors are true. The other rumors include iPhone 5 as well as Apple dropping Google Maps for their own maps tool.
Here is the source of the report: http://mashable.com/2012/06/05/apple-update-macs-wwdc/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Mashable+%28Mashable%29