Definetely not... lolIt really depends on how the video has been encoded. For instance i have some 1080p encodes i did myself and they typically use between 50-85% of my E6600 whilst playing back, so i really dont think the atom is going to like them.
Well, it's not really "FullHD ready" if you need to re-encode stuff to make it fit the processing capabilities of something else... The CPU should be able to handle it as the worst case scenario on HD-DVD and/or BR disks...However if you are encoding the videos yourself then you could drop some of the more complex encoding options (CABAC etc) and perhaps reduce the bitrate to get it to fit insides the Atoms CPU capacity, in doing so you would be able to almost guarantee every encode you do works on the system.
Exactly. Though truth be told that even with the UVD decoder of the Radeon HD cards, you still need to be able to feed the card with enough data, and handle the resulting data stream. Low speed Semprons aren't able to deal with this setup (I think it was over at SPCR that I saw something about this), so there is a minimum CPU power required to handle HD content, even with a decoder chip.The real benefit will be when Intel includes the Atom with a DXVA GPU, that way you can simply do all the decoding on the GPU, regardless of how powerfull the cpu is.