Project Vasari 2.1 contains a number of new enhancements:
Autodesk announced this new version on Labs a couple of days ago:

Ecotect Wind Tunnel Analysis: Use the Wind Tunnel feature in conjunction with Ecotect Wind Rose analysis to dynamically simulate the impact of wind speed and direction on your projects. This prototype plugin provides a simplified computational fluid dynamics simulation that provides designers and engineers a ‘virtual wind tunnel’ to gain an insight on aerodynamic effects early in the design process. Main uses for this tool are:

  • Exterior Air Flow: 2d and 3d tools provide a highly visual understanding of how air will flow across your building and site
  • Pedestrian Comfort: 3D simulations of key airflow circulation paths to provide an indication of the potential impact on pedestrian comfort.
  • Natural Ventilation Boundary Conditions: 3D simulations of air flow across buildings to estimate the external pressure envelope.

Improved Automatic Zoning for Energy Models: Now when you create energy models and run energy simulations, an enhanced algorithm results in automatic interior (core) and perimeter zones that follow ASHRAE 90.1 Appendix G Thermal Block requirements for a conceptual model.

Performance Enhancements: The Conceptual Energy Analysis feature is now faster across the board. The time needed for separate processes (creation of the energy model, transmission time, and simulation of energy use) have been reduced significantly.

Check out the new videos and descriptions of these features:

Autodesk also released an additional add-in, called Parametric Sliders, that is also available from the download link above. This is part of a new series of work-in-progress add-ins they are developing, so continue to watch this space!

Parametric Sliders: The Parameter Sliders add-in provides a graphical interface for flexing parameters defined in loaded and in-place families. This add-in is a Work in Progress (W.I.P.) and is a separate installer that works with Project Vasari 2.1.