Saw this announcement from the folks over at Motorola, looks like the Sling folks may have really started something here.

http://presszoom.com/story_115869.html

from the release: "Part of the Motorola Follow Me TV experience, new technology makes recorded shows available on a next-generation RAZR"

Though it doesn't take long to realize that with Motorola equipment required on both ends, this is not likely to have widespread appeal in the short term.