According to the Forrsights Workforce Employee Survey for Q1 2011 from Forrester Research Inc., March 2011, "overall, 13% of employees who use a laptop at the office report that they chose their own "work" laptop and paid for all of it themselves." That means their PC needs to work great at home and at work.
However, there're specific features in Windows 7 designed to make you more productive at work. Out of those features, Microsoft Windows team picked 5 of the lesser known ones and turned them into super fun videos:
Win + P:
Windows XP Mode:
Problem Steps Recorder:
[Source: Windows team blog]