这个ANA只是一个普通的硬件拉伸芯片吧，XO一直都在使用它，包括720p，480p都是这个东西实现的，秋季更新只是开放了1080p的一个拉伸规格而已，不知道怎么会被认为是秘密武器？

XO不是什么硬上1080p，XO本来就可以上1080p，为什么不上1080p是因为微软认为没有必要而已，而且显示设备不成熟而已，不要说得好象XO上1080p是被PS3逼的一样。微软一直的观点就是游戏没有必要1080p，但是如果用户真的十分需要，也可以实现1080p。

再次引用05年的这篇对Todd Holmdahl的采访

Q:I understand the choice of 720p over 1080i because of the fast-motion action sequences involved in gaming; a progressive scan picture is better than an interlaced one for this case, but lately we have seen more and more 1080p capable displays, especially DLP-based flat screens (although 1080p doesn’t belong to ATSC’s specifications for HDTV). The question is, will the Xbox 360 be able to offer a 1080p signal? Is the Xbox 360 GPU powerful enough to render games up to that resolution at playable framerates?

Todd Holmdahl: Xbox 360 offers choice for both the game developer and the end consumer. The game developer can create their game in any resolution. The consumer can request any output resolution (480i, 480p, 720p, 1080i). The Xbox 360’s advanced video scaler will scale the game’s native resolution to the end consumer’s requested resolution with extremely high quality output. Bottom line, the games will look amazing.

Xbox 360 does not support 1080p at this time. It’s an incremental improvement at an astronomical expense, and we don’t see consumers clamoring for 1080p TVs yet. We will continue evaluate the market and deliver the capability when and if customers want it.

As for the GPU, the Xbox 360 has the most powerful GPU of any gaming console; even better, we made specific design choices to enable game developers to render real-time complex scenes at high resolutions with high-quality anti-aliasing. Without our Embedded DRAM on the GPU and the huge 256Gbyes/second dedicated bus from the GPU core to the EDRAM, it is impossible to render true next-generation scene complexity at high-resolution with anti-aliasing.

原文见http://interviews.teamxbox.com/x ... w-Todd-Holmdahl/p1/