We have all heard about the Resource Electricpig , On the Basis of Informed Sources, in April , Apple Plans to Release the new 15-inch MacBook Air, Rumors of which we have heard last year .And So The 1st Step Toward Unification of the Two Notebook lines – Air and Pro .
A Laptop is not Expected to Receive an Ethernet Connector & the Drive For the DVD drive ( iCloud & online App Store Apple which will be offset by the Lack of Opportunities ) And will be Enclosed in Aluminum Housing . 
Specifications of 15-inch MacBook Air is not yet known .It is Expected that the New Laptop Will Get the Next Generation Intel Ivy Bridge ( 1st installment will appear in April ) , And Intel HD Graphics Accelerator, 4000 , Which is About 30-40 % More Productive than Intel HD 3000 in the Current MacBook Air .
The delivery of the New Model Could Begin With in 3 months After the Announcement. Recall that At the Present time,Apple Sells the MacBook Air with Screens 11.6 & 13.3 inches that is welkhown in the market.
And I just bought my macbook pro 2 months ago because I found the air too lacking. With the release of the 15″ macbook air, I would surely consider letting my macbook pro go in exchange for the air. Unless of course it comes with a hefty price tag.
Thank for the comment my friend