The point is that currently producing a single collision may cost a couple million dollars of brute force for now. So we should expect it to be used (there are attacks where that much money is invested, either a very valuable target or very many low-value targets), but we should expect to see one only after a highly targeted attack is detected and analyized - in the case of Flame, those steps took a few years.

Some government agency MITM'ing major social sites or email providers would be rather possible at that cost.