The next iPhones will know the difference between a hard and soft tap, and might come in pink
Force Touch lets the Watch or the trackpad on the new MacBooks distinguish between a regular light tap and a harder press.
The two different types of touch can be used to add more features - for instance, on the upcoming Macbooks, if you hover over an address in the Apple Mail program and press hard, a map of the address will show up.
The Journal is also reporting that the display sizes of the new iPhones will remain the same as today's iPhone 6 (4.7 inches diagonally) and iPhone 6 Plus (5.5 inches), but Apple is testing a new color: pink.
Apple usually updates its iPhone line in the fall.