We might be straying into supposition here, but I don't think it's that big of a leap. When we take a look at this display screen with the tell-tale cracks in the glass, and when combine that with a story from Tim...

"Me and my brother were having a browse at some TV's in our local Comet store in Edinburgh when we came accross the Wii display case. We were wondering why it wasn't available for playing and the cordens had been removed but on closer inspection we realised why. Even with the health and saftey disclamer, the attendant watching your back and the wrist strap, the display TV wasn't safe!!! Cheers, Tim E"

Cheers indeed Tim. I'm going to say that it's a strong possibility that you're right about some passerby giving the display TV a good whack with a Wii Remote. It would appear that you don't have to own a Wii to behave carelessly with one. Now I suppose it's also plausible that the TV damage could also have been received from some runaway shopping cart or a rouge baseball from over in the sporting goods department, but I think a mishandled Wii remote is our strongest theory to date.