Today Apple previewed the next version — 4.0 — of the iPhone OS, the software that powers the company's iPhone, iPod Touch, and iPad products, a preview version of which it is unleashing on developers today. Apple will release the product to iPhone and iPod Touch owners this summer, and to iPad owners in the Fall. Apple's customers and partners will largely welcome the innovations in this new release, though there are undoubtedly segments who will complain vehemently. Specifically: