It now integrates tons of specialized results such as embedded videos and smart answers to direct questions. It will only move further and further away from simple lists of sites as their AI improves.
I fear this fine will deter innovation here as any special results Google adds will be scrutinized heavily. It's also very possible the complex data they need for it's 'smart' results aren't available by integrating with other 3rd party services (at least not initially), which is likely why Google even created these competing services in the first place.
If Google was merely a Yellow Pages style service as it was previously then I'd be more sympathetic to the idea of distorted rankings favouring Google services but that's becoming less and less the typical user experience.