Summary: Twitter filed its IPO paperwork, confidentially. Jason predicts its market cap will be $16 billion on the day it goes public. Meantime, Apple released the iPhone 5s + 5c. Not cheap enough for China, but certainly stirred up the blogosphere with some colorful plastic cases and classic Apple flash. For Launch of the Week: Disrupt's Startup Battlefield winner Layer, call and messaging stack for app developers; finalist Soil IQ which takes water and temperature measurements in farms; Kickstarter success Haptix, a 3D camera that turns any flat surface into multitouch, to control nearby screens. Ben Parr of DominateFund and tech journalist Jessica Lessin join us for This Week in Startups' weekly news roundtable.
