Amazon Unbox is probably one of the simplest non-Apple services for renting and buying downloaded TV shows and movies on a PC. The service is also compatible with TiVo, but I know a few folks who refuse to pay for any video unless it comes in high definition. And so far, HD video has not been available via Amazon Unbox.

Bu it looks like that could be changing. TiVo Vice President Jim Denney tells TV Week that HD capabilities are coming to Amazon "in the not too distant future." And judging from the source, I'm going to go out on a limb and assume that means you'll be able to download and watch HD video using a TiVo HD or TiVo Series. As MegaZone at Gizmo Lovers suggests, it's likely that Amazon will use the H.264 codec, which would let the company distribute high definition videos with relatively small file sizes (relative being the key word here).

[via Zatz Not Funny]