To test Intel's Graphics Media Accelerator HD video playback capabilities with Arrandale, we played an H.264 encoded, 1080p HD video clip with both Windows Media Player and QuickTime 7. Though we don't have screen grabs of Blu-ray disc playback performance here, we would offer that the results were very similar to what you'll see in the movie trailer screen shots below.
1080p H.264 QuickTime Playback
1080p H.264 Windows Media Player Playback
Arrandale doesn't even break a sweat here and CPU utilization ranges from about 3% in Windows Media Player, to about 27% in the QuickTime player. Either way, playback was perfect and image quality was excellent, though QuickTime currently doesn't support Intel Graphics Media Accelerator HD IGP as of yet. In the future you can expect similar performance from both player platforms.