The Mac and iPod will likely continue to decline in importance for Apple, says Bullish Cross' Andy Zaky. The writer/analyst notes that the iPhone has been Apple's main source of revenue for about three quarters so far, while the Mac has been falling in relative importance even as its revenue grows. By the end of Apple's 2010 fiscal year in September, the iPhone is expected to account for 37.4 percent of revenue. The amount might have been 40.8 percent, says Zaky, if Apple had not introduced the iPad in April.