"Some of the other features in this upgrade include...Switchable aspect ratio now available during video playback (Auto to Letterbox, Zoom, Stretch, Native). Support for streaming WM-DRM protected content from a PC. Folder view for video content on connected devices. H.264 video support: Up to 15 Mbps, Baseline, Main, and High (up to level 4.1) Profiles with 2 channel AAC LC and Main Profiles. Added MPEG-4 Part 2 video support: Up to 8 Mbps, Simple Profile with 2 channel AAC LC and Main Profiles. Show folder hierarchy for video content played from all devices. Bookmarks are stored for each video that the user plays remembering the users last location in the file as well as the aspect ratio that the user choose for that file. Video trick modes (fast forward, rewind, chapter skip) can now be used while downloading Video Marketplace content. Skip forward and backward functionality has been improved to skip to the next or previous chapter. Each video is divided into 10 “chapters” allowing you to quickly skip around video content." Looks like the spring update isn't just a bug fix/feature enhancement. There's some real meat here! MPEG-4 support, h.264 support, video chapters, streaming video while downloading...Microsoft has added some serious video playback upgrades to the 360. They're really positioning the 360 to be the "do it all" device in the living room. Can't wait!