Apple has introduced i5 and i7 MacBook Pros.
Gizmodo has some benchmarks. Here are some Core 2 Duo v i5 v i7 benchmarks [Tom’s Hardware] from the PC world.
Aside from the obvious performance improvements other differences seem to be
- Smarter video switching between integrated and standalone GPU’s (no longer requiring a login) [Arstechnica]
- Audio signal is provided on the DisplayPort adaptor[Arstechnica]