Just because Hamilton outpaced him in F3 doesn't mean that he will outpace him in F1.
If I was a leading team looking to sign a test driver (like Honda were) then Sutil would be on the list.
Then at least you could assess him more fully to see whether he deserves a F1 drive, he won Japanese F3 this season did he not? Not that that is much to boast about though
I know what you mean though - if all these future F1 champions come into F1, they will never become the double or triple world champion because there are too many of them.
A lot will depend on what team they will drive for, and being in the right place at the right time e.g. if BMW continue their rapid rise then Kubica and Vettel could find themselves in very good positions in future but other drivers like Kovleinen could suffer if Renault struggle as could (whisper it) Hamilton if McLaren produce a dog of a car like this year's one was.