I didn't realize just how much I relied on Zite until it was gone. I tried to launch it several times a day in the week after it was turned off.
If anything, Flipboard has taught me that the UI of flipping pages is best left to physical magazines, where each page can have enough information density to make it worthwhile. Maybe the flipboard flip action works better on a tablet; but on a phone I can't bring myself to use it, no matter how much of Zite's technology they fold in.