Some new features in IE8 Beta 1:
- Activities – Activities are contextual services that provide quick access to external services from any webpage. Activities typically involve one of two types of actions.
- WebSlices – Web sites can expose portions of their page as a WebSlice that users can subscribe to and bring that content with them on their links bar wherever they are on the web. Users receive update notifications when the content changes.
- Choice of layout engine – Internet Explorer 8 Beta 1 will ship in standards mode by default. However, three different rendering modes (Quirks mode, Strict mode and IE8 standards mode) that may be set using the X-UA-Compatible header.
Copy + Paste from IE8 Official Site:
Internet Explorer 8 Beta 1 (Developer Preview)
Welcome to the website for Internet Explorer 8 Beta 1. Internet Explorer 8 Beta 1 is a developer preview for web designers and developers to help prepare their websites for the launch of Internet Explorer 8. Some of the new features designed for developers include a developer toolbar and improved interoperability and compatibility.
Internet Explorer 8 is designed to work in standard mode out of this box. However, Microsoft provides a way for users to browse the web in a way similar to Internet Explorer 7 by using the emulate Internet Explorer 7 button on the chrome. The web at your service
Internet Explorer 8 will take the web experience beyond the page. Internet Explorer 8 introduces a new way to seamlessly experience the best of the web whether you are a web developer writing to standards or a user discovering a new online service. Be one of the first developers to take advantage of improvements in Internet Explorer 8 for your websites and applications.