Apple is expected to refresh both its MacBook Pro and MacBook Air lines in June 2013 with internal upgrades while, reportedly, retaining their current design.

Apple debuted a new MacBook Pro design earlier this year with both the 15" and 13" Retina display models but hasn't made any significant changes to the aluminum unibody enclosure it debuted in 2008. Five years is a long time to not make any significant changes to the construction, especially for a company like Apple who is so highly regarded for design. I guess they're taking the "if it's not broke, don't fix it" attitude with the MacBook Pro line.

As for the MacBook Air, there reportedly won't be any design changes externally but Apple is expected to use Intel's next-generation Haswell architecture in the MacBook Air refresh. Intel's next-generation chip is expected to offer performance boosts, an improved GPU (graphics processing unit) and far lower power consumption, possibly giving the MacBook Air the 10+ hour spec Apple loves to tout when it comes to the iPad's battery life.

Apple has been inspired by the iPad, in the past, when it comes to designing the MacBoook Air. In 2010, Apple updated the look of the MacBook Air's unibody enclosure and attributed it to design cues it had taken from the iPad, giving the MacBook Air a more angular, thinner and sharper design over its predecessor.

It will be interesting to see if Digitimes is correct in their reporting, as many people believe Apple will update the MacBook Air with a Retina display option in 2013.