Bloomberg reports that Apple is preparing laptop upgrades with models that are thinner than the existing Pro units; the new machines are expected to run on Intel's Ivy Bridge processors. This follows on rumors from earlier today that a new MacBook Pro and iMac appeared on the Geekbench benchmarking tool.
The machines, which Bloomberg says are to be announced during WWDC, are also expected to sport Retina or HiDPI displays and a flash memory subsystem to speed up boot times. All those details are in line with a post from 9to5 Mac earlier today.
Bloomberg also says that Apple might announce Mountain Lion's release date during WWDC as well.