Now that's an idea. I could see a Siri-like interaction with Finder/other application's popup windows. That would be very useful in the workplace!
Using voice controls for inputs like these would be nice:
-Yes or No (all over OS X)
-Send Report or Ignore (Upon application crashing)
-Open or Don't Open (Upon opening a downloaded application for the first time)
-Quit (inside Software Update, though it is integrating with the App Store in ML)
-Close all tabs or Close Tab or Close (Safari)
"Begin new tweet" - for Twitter
"Check for new mail" - for Mail
"Create new mail draft" - for Mail
"Open/Go to websitenamehere.com" - for Safari
"Rotate image to the left/right" - for iPhoto
"Connect to server" - to bring the same result as when pressing Command+K in Finder
"Empty the Trash" - for Finder
"Open my Documents; Desktop; Music; Movies; Shared folder (whatever you say)" - for Finder
"Open the directory /Directory/You/Want/here" - for Finder
"What application is using the most power/RAM on my machine?" -for Activity Monitor
"Shut down; Restart; Sleep" -Universal
"What is the weather like today?" -copying current Siri
"Play my current Keynote presentation" -for Keynote
"Run application in full screen" -Universal
"Are there any updates available?" -for Mac App Store and Software Update
"Copy; Cut the selected text/image" -Universal
"Paste; Paste and match style from clipboard" -Universal
Etc...
The more that I think about it, better voice controls or Siri for Mac would be a treat. Though not a necessity, it would be nice. Maybe triggered by a hotkey on our Macs?