[jeffbee]

That's a great feature for identifying the source of an image, too. Particularly, if someone on Twitter is subtweeting someone with a screenshot, you can get to the original tweet in three taps. I also used it the other day to select and copy all the text from a PDF where text selection had been disabled. Voice recognition and dictation also seems to be years ahead of what you get on iOS, at least with my voice and English.