Also, inline support for video types (well, two video types) will also change how things work. No more embedding in a player, as long as you use Ogg Vorbis and H.264. All that will be handled native in the browser. No more broken plug-ins, no more codec hunting (well, you'll probably have to do this anyways). Of course, to get videos to display across all browsers, you'll have to encode twice - once in the format that Firefox and Opera understand (Ogg Vorbis) and once in the format that Safari and Android browsers understand (H.264). Thankfully, Chrome understands both and Internet Explorer understands neither. I would suspect that IE will be the traditional pain in the ass that it is, and only support Windows Media formats.
Edit: IE will support H.264.