this seems to be a visualization of data already present in the logs (behind some labs addon IIRC), but while useful it's a far cry from what new relic does (i.e. insights into _what_ is taking time and why, not just how much/when).
The Metrics displayed in the new Dashboard focus on the characteristics of app execution on Heroku, rather than internal instrumentation of the application. Hopefully that's useful in providing more visibility into tuning applications on the platform.