Yeah, widescreen TVs are generally more expensive and likely to be used for households and families. More users would be likely to vote on a shared system, because it can be a group activity.
Just about everywhere I've seen widescreens in a home is in a shared area, while personal screens are typically 4:3, so it makes sense for that to happen. IE, I have a widescreen downstairs, but I personally have two 4:3 screens in my possession, while my roommate has a single 4:3. However, the Wii is connected to the widescreen, and both of us voted for widescreen. So that's three 4:3 screens for one widescreen, yet two widescreen votes.