Here are a few pictures and videos from yesterday's TechFest preview hosted by Microsoft Chief Research and Strategy Officer Craig Mundie.

Here's a video of Mundie demonstrating a 3-D climate-change model that's controlled with gestures and voice commands. The model was created with the Microsoft Computational Science Studio, a research tool for quickly building and visualizing complex models with massive datasets, developed at the company's lab at Cambridge University. (The video doesn't do justice to the 3-D presentation, but you can see the gesture and voice control in action.)

A charging tray in Microsoft's eHome prototype gallery that also displays information from devices such as watches and phones:

Jonathan Cluts, general manager of eHome, showing a display system that projects a kids' party game onto a dining room table. Each guest can fly a biplane around the table, controlling them by holding their hands over controls projected at their "place setting." A scene with planes zooming around is also projected onto the wall:

The "Project Gustav" demonstration at TechFest, with realistic brush deformation captured on an input tablet:

A working prototype of the "Cloud Mouse" for navigating cloud computing interfaces:

Demonstrating how a doctor could use a Surface computer to analyze images and compare them with images drawn from the Web is Dr. Michael Gillam, director of Microsoft's Healthcare Innovation Lab in Washington, D.C.