The Windows Team Blog stated that the release is still under development and the final release may feature some changes , so the present OS may be buggy, which they need the reviewers to report via post on their blog , so that they can be ruled out.
The hardware requirements for Windows 8 are :
- 1 GHz or faster processor
- 1 GB RAM (32-bit) or 2 GB RAM (64-bit)
- 16 GB available hard disk space (32-bit) or 20 GB (64-bit)
- DirectX 9 graphics device with WDDM 1.0 or higher driver
- 1024 x 768 minimum screen resolution
For detailed review on the features in the new build , please go the the mentioned blog and from there only you can download the release to test out on your respective device.