It's been three-and-a-half years since Apple (AAPL 0.54%) released the first iPad, arguably the last company-changing innovation for the Mac maker. Lately, Apple has been more focused on incremental improvements like iTunes Radio and Photostream, which are nice but not flashy products. But are these products enough to make customers and investors happy? Contributor Travis Hoium covers why these improvements will keep Apple's ecosystem alive and profits light.