Apple's yearly developer conference should see iOS 8, OS X 10.10, and likely some hardware.
Ultra-thin and Ultra-light Mac Notebook in 2007
The upcoming Apple notebook is said to feature a 12" display, 0.6-0.7 inches thick, and weigh less than 3 pounds. MacScoop's sources are unclear if an optical drive will accompany this ultra-portable notebook, but do feel it is likely to come by year's end (2007).
For reference, Apple's current 15" MacBook Pro weighs 5.4lbs with a 1 inch thickness.
Rumors of a ultra-portable Apple laptop have been ongoing since late 2006. MacScoop reported in December 2006 about the upcoming 12" ultra-portable MacBook Pro with additional details provided by Appleinsider in February. There are some conflicting reports with one summary that believed the ultra-portable would carry a 13" LED display.