Service Pack 1 (SP1) for Windows 7 and Windows Server 2008 R2 includes previously released updates and delivers a number of powerful new features for Windows Server 2008 R2 for virtualization and Virtual Desktop Infrastructure (VDI). New techniques in memory management with the addition of Dynamic Memory functionality, as well as the ability to deliver full-fidelity graphic experiences in remote and virtualized environments with RemoteFX, enable organizations to realize the greatest possible potential from their infrastructure.
Microsoft continuously collects feedback on Windows 7 and Windows Server 2008 R2 operating systems from its customers and partners. This feedback results in enhancements that help improve compatibility, reliability, performance, and user experience. These enhancements are typically made available in the form of regular updates delivered via Windows Update and, in some cases, the Microsoft Download Center. All updates are then rolled-up, along with additional enhancements, into a single package called a Service Pack. By integrating these updates into a thoroughly tested single service pack, Microsoft aims to provide a single high-quality update that will minimize both deployment and testing complexity for customers. Check it out over here.