At today's Apple event the company pulled the wraps off the iPhone 6s. The phone keeps the exterior of its predecessor, but features all new internals and some nice new extras. Those include a new processor, updated cameras at the front and back, and a pressure sensitive 3D Touch display. 3D Touch In addition to multitouch, the new iPhone 6s recognizes force. It works on the homescreen and gives you shortcuts on the stuff you do frequently. Pressing lightly on an email thread, gives you a preview of the message, for example. It also provides distinct and tactile feedback to your presses. Under the display, there's a vibrating "Taptic engine", which is similar to the one found on the Macbook trackpad and on the Apple Watch. Otherwise, the display is the same 4.7" Retina display found on the iPhone 6....
Source: http://www.gsmarena.com/apple_officially_unveils_the_iphone_6s_sales_start_september_20-news-13931.php