Yes, you are right! Microsoft has already revealed the release of SP1 for SharePoint 2010 and Office 2010 at the end of June 2011.
On the Microsoft SharePoint Team Blog, Bill Baer, Senior Technical Product Manager, Microsoft Corporation, has provided some of the improvements we could expect. The SP1, moreover, will bring us several remarkable updates across client suites. The Microsoft Office Sustained Engineering and Release Team provides us the details.