Finally we have confirmation from Microsoft as to the official system requirements for Windows 7.
Here they are:
- 1 GHz or faster 32-bit (x86) or 64-bit (x64) processor
- 1 GB of RAM (32-bit)/2 GB of RAM (64-bit)
- 16 GB of available disk space (32-bit)/20 GB (64-bit)
- DirectX 9 graphics device with Windows Display Driver Model 1.0 or higher driver
By today's hardware standards, these requirements are pretty tame.