A few things I tried to ask Cortana this weekend which she can't do yet:
Cortana please take me to the next Starbucks (or gas or hospital) along the route I am driving.
Cortana please point toward the Big Dipper (or Mt. Baker or my friend's phone or east or the nearest subway station).
Cortana, what kind of plant likes partial shade, is 2-3 feet tall, blooms in summer, and is avoided by rabbits and slugs (in my climate zone)?
Cortana, how many teams have won the Super Bowl 2 years in a row with a quarterback named "Russell"?
Cortana, please get me tickets to the next Husky Volleyball game (she looks it up, makes sure my calendar is clear that evening, knows what kind of seats I want, gives me the details, and asks me to confirm before purchasing).
Cortana, where can I find this toaster cheaper (where I point camera at the UPC barcode and she knows where I'm shopping now)?
Cortana, can you get me on the waiting list at Cactus?