It's mind-boggling that Siri has been around on the iPhone for nearly six years and hasn't gotten much smarter in ways that would actually be beneficial to me. I hope they eventually develop a Siri standalone app and APIs that allow people to specify third-party applications Siri should use for directions, weather, etc.
It would also be nice if we could use a standalone Siri app to develop complex workflows that could then be triggered with a simple voice command. If Apple does something like this, Siri will be head and shoulders ahead of the competition instead of lagging further and further behind. Imagine if I could say "Good morning, Siri" and instead of it simply telling me "Good morning", it told me the weather, my calendar for the day, and a few top headlines (or whatever I configured it to tell me when I used the phrase "Good morning"). That's pretty basic (and I think it's something Alexa already does). However, it gets to be more powerful when I can say one phrase and then Siri starts sending texts, sending e-mails, and making a phone call all without me having to intervene further.