To be honest: This would turn me off even more than the current example which is also hard to read/understand as a non Haskell programmer.
The fibonacci example in another comment in this thread however is very easy to understand and would fit much better.
Well the one-liner form I probably have overseen. It's a lot better than the other variations but I do think that the fibonacci example does show Haskell in a much more understandable way than the allRationals one-liner.
But maybe that's a bit me: I don't particularly like one-liners because as an outsider it takes usually a bit more time to understand it than more lines..
