Apple on Wednesday presented its new smartphones, the iPhone 6S and the iPhone 6S Plus, equipping the devices with a new pressure-sensitive display, a more faster and a more powerful camera. "What we have to show you today is really fantastic," CEO Tim Cook said during Apple's presentation at the Bill Graham Auditorium in downtown San Francisco. “While they may look familiar, we've changed everything in these new iPhones.” This year's iPhone is Apple's "S" year. This means that Apple keeps the same basic design of the device but adds other features to attract buyers, such as the Siri digital voice assistant in the iPhone 4S and the TouchID fingerprint reader in the iPhone 5S. The iPhone has become more vital than ever to the market. the company's financial results following the introduction of Apple's larger-screen smartphones a year ago. It has made up more than two-thirds of sales in recent quarters since Apple launched the iPhone 6 and iPhone 6 Plus in September 2014. Typically, the iPhone accounts for nearly 50% of Apple's revenue. This means that keeping customers interested in the iPhone is critical for Apple to remain a major technology leader. A main feature of this year's iPhone 6S was expected to be the Force Touch technology used in the Apple Watch, a pressure-sensitive display that responds to various types of touches. The company instead presented 3D Touch, a feature that seems to have the same capabilities. For example, it will allow a user to peek into an email by pressing on the subject. Enlarge image Using 3D Touch, users of the new iPhones can perform different actions based on the amount of pressure applied with a touch. James Martin/CNETIn another noteworthy change, Siri can be activated by voice... middle of paper... ready for upgrade," he said. "As important as new products are, the price of the products older is important." However, concerns have emerged that demand could slow for Apple's biggest money maker. The smartphone market overall is not growing as fast as it once was. Worldwide shipments are only expected to increase by about 10% this year, according to IDC, well below the 28% increase in 2014, with China taking much of the blame for that slowdown. The smartphone market has matured and the country's stock market is in turmoil over concerns about an economic slowdown. In an unusual move, he emailed CNBC host Jim Cramer last month to say that despite concerns about the Chinese stock market, Apple has "continued to post a strong growth for our China business in July and August"..