What's the next Sudoku? Now there's a puzzle

Some are easy to figure out, like the clues in a newspaper's Monday crossword, a beginner's Sudoku grid or cryptogram. Others are more difficult.
But one puzzle that has proved impossible to solve, even by the best in the business, is this: What's the Next Big Thing in puzzles?

Which is to say, the next Sudoku, the next logic, number or word craze to rock the world, muscle its way into magazines and newspapers or drive publishers to delirium printing collections for the new game's fans. For Details