That is an interesting bracket. However, it may void a TV warranty because of the pressure it would place on the bezel of the TV screen. Such pressure can and does cause uneven pressure on the edge of the LCD or plasma panel and may cause light leakage from the back lights or other damage to a plasma panel.
Some center channel speakers like my Infinity CC-2 weigh in at almost 22lbs. Many CC speakers are made rather heavy to dampen internal vibrations and resonance for optimum sound quality. I've seen some CC speakers run close to 30 lbs. I have my 46" LCD nestled in an oak TV ensemble with a "bridged": shelf between two side towers that have shelves. The wooden bridge is 2" thick but needs a center support to keep the CC speaker from warping it.