Hi John and Royi A,
Yes we definitely want to offer larger preview images and we also plan to support video from popular video sites like YouTube and Vimeo. No plans for animated images currently but the video support means you can go much further with animation if you wish. One of the things we are trying to decide is whether to support HiDPI/Retina images. Of we do that we need to ask for double the resolution. So let's say our image requirement was 1280 x 800 px, you would have to submit a 2560 x 1600 px image for each preview. Of course double the resolution also means roughly double the load times per image so it's something we are not sure about but right now I think we won;t support HiDPI/Retina previews just yet but as more uses go to higher resolution screens we could add that support. anyway, your input and of course other producers and users input would be valuable here.
Thanks,
Jonathan
