The Rosetta dynamic translator that lets PowerPC apps run on an Intel-based Mac is optional and not installed by default on Snow Leopard. While there are Intel versions of most applications available today, for people like me who still have PowerPC utilities it was neat to see Apple make Rosetta dynamically available for download on Macs that do not have it installed but need to run older code. Despite it's availability and ease of installation, at this point I would consider Rosetta to be Apple's last effort at providing PowerPC support, and a feature that is not guaranteed to work.
