Where are the mounting holes on a Panasonic Viera?
Also asked, what size screws for Panasonic TV wall mount?
However, if you choose to use another brand of wall bracket, please be sure it will accommodate the position of the mounting bolt holes on the Panasonic Plasma TV (660mm x 320mm pattern), the thread of the screws (M8 type), and support the weight of the display (consult the Operating Instruction manual for your model).
Then, are Panasonic TVs VESA compatible?
No, it's not a standard size - standard sizes are normally 200x200mm, 400x300mm, 400x400mm. The Panasonic 55" Plasmas are 500x300mm which is a standard VESA size but wouldn't fit on your bracket. You need to use an M8 size bolt with a screw depth (into the socket of the TV) of 17mm-23mm.
TV stands do take up more room than wall mounted versions, so if you have restrictions on your floor space, they probably aren't the best option. Being balanced on a table also means that if someone knocks them, the TV can fall over. If you have children or pets, a TV mount may be a better idea.