Apple's Siri has appmakers excited, but it could end up frustrating them

Despite the increasing amount of time people spend on their smartphones, the app market is in a lull. Facebook, Snapchat, Uber and other big-name apps get heaps of downloads. But most everyone else is seeing demand level off. That's why appmakers are excited about Apple's expected announcement at its Worldwide Developer's Conference on Monday that apps may integrate with virtual assistant Siri. This would allow developers to build software allowing iPhone users to, say, talk to Siri to request a ride, order their meals or shop.