The transparency of who actually is good. The talent in companies ebbs and flows and the scores will reflect the work they are doing now, not what they did in their best or worst days.
There are many boutique companies that are excellent, but don't have a fair share at the market.
Companies that are 'all things to all men' tend to have quality issues over time... like the big security giants of the last decade. Eventually people get tired of it and look for specialists. That's where this will help.