Yea I've seen a couple types of these things:
Adhesive backed film to apply
Static (non adhesive) film to apply
Acrylic like that fastens to TV by velcro, straps or adhesive
Acrylic like that "hangs" from the top of the TV
Problem is , they are all expensive , and cant find enough objective evidence of whether or not they can both be trusted to be safe and work.
A few others are:
GlareStopper
NuShield
ViewGuard
TV-Armor
TheScreenProtector ( <- I kind of like the way this appears to work, safe-ish and unobtrusive looking )
http://www.thescreenprotector.com/acatalog/Customer_Services.html
I did check on a couple of the acrylic offerings ( not the above one yet though ) and they wanted over 100 bucks for shipping ( freight, due to size )
And i think it looks like some people might be getting matte acrylic sheets , cut to size, from local glass shops ?
This last idea seems the safe-est but still expensive for an unknown result.
For example, how would you attach the plexi from the glass shop safely and effectively?
also, some are getting from photo framing houses ... museum quality / matte / anti-glare anti-reflection acrylic for large art and posters ?
Still looking at options and looking for any feedback or experience.