Is totally false.
PCs hold back ultra PCs.
Developers will take into account lower powered PCs because countries like Asia don't have the latest i7 and GTX 680. They don't even have 2GB of ram. They have salvaged parts and they need games that are super optimized.
This is why LOL and DOTA are so popular in Asia. The games look decent on fast PCs but look decent on the slowest PCs too.