Taiwan's DigiTimes is reporting that Apple is planning to expand their non-pro MacBook line to include a large screen 15.4-inch model in the second quarter of 2007:
Apple is planning to introduce 15.4-inch MacBooks in the second quarter of 2007, according to industry sources in Taiwan. The new model will fill the gap between the company's 13.3-inch MacBooks and the 15.4- and 17-inch MacBook Pros that form its current notebook line up, and is expected to boost shipments of Apple's Intel-powered MacBooks, the sources add.
Although current 13.3-inch MacBooks are manufactured by Asustek Computer the new 15.4-inch model will be manufactured by Quanta Computer which also manufactures Apple's MacBook Pros. According to the report iPod manufacturer Foxconn was also bidding on the 15.4-inch manufacturing contract but was not successful.
No word on what, if any, new features will be added to the new 15-inch MacBook, but I wouldn't expect it to be much different from current MacBooks other than the larger screen size and perhaps a standard RAM and/or HDD bump. Apple doesn't want to jeopardize sales of their high end MacBook Pro.
13.3-inch MacBooks currently cost between US$1,099 and US$1,499 and 15.4 and 17-inch MacBook Pros cost between US$1,999 and US$2,799.