Okay, so I have a 13" Late 2009 MacBook. Normal display. I don't plan to stream my TV Shows to an actual HDTV. But I was wondering, would buying the HD version of, say, The Simpsons Season 23 have much of a difference in quality over SD? I have no clue if this display is supposed to be HD-compatible, so yeah. I've tried the 30-second preview for both the SD and HD versions, but I don't see a difference, possibly because they use the HD version for the previews. I only buy animated programs, like Family Guy, if that helps.