Your correct of course but I think Charlie saw the pic with the wooden beam to the top right and put 2 & 2 together and got several?To be fair so did I when I first saw it but it just goes to show ask a question first and then post like complete twat later (I wish the joy of viewing and fiddling around at rear to all who mount the panel too high on wall ... )
Yeah agreed John around a metre up is generally about right for sets of around 40" & over.
There are other wall mounting options to the fixed types though. I have a Vogels that is a dual wishbone cantilever wall mount & from its furthest back position I can pull it out a further 17 & a half inches into the room. This mount also allows 120 degrees of side to side tilt so access for hookups is very easy. I have mine at a pretty ideal height, but even mounted higher up summat similar to this would make life much easier. I only have a 40" Sammy & my mount should be good for sets of up to 46/50"". I believe they do a larger version, last I looked at least.
Not cheap, but well engineered & nicely made with a quality feel/action & just well worth it lMV. A bonus of being able to pull it out further is that I get a slightly more cinematic effect as I don't have a huge viewing distance.
I'll likely be buying a new set sometime next year & although a 46" is doable by moving the whole mount several inches to the left I can easily accommodate a newer 42" set in the same space. Due to many of the latest sets having such narrow bezels, the wall footprint should be around the same.
Here's the model I have>>>>>
Vogel's EFW6345 Universal Optimally Adjustable Double Arm 31"-42" LCD / Plasma TV Wall Bracket
http://www.amazon.co.uk/Vogels-EFW6345-Universal-Optimally-Adjustable/dp/B000CDHQGG?ref=bit_bds-p12_serp_ff_usnat_link&tag=bds-p12-serp-us-ff-20&ascsubtag= Vogels EFW 6345 PLUS LED / LCD / Plasma TV Bracket Cantilever 32"-65" VESA.
This model is easily good for TV's up to 50" & can actually handle a weight of up to 45kg. The larger 6445+ can manage sets of up to 65".

Each individual arm element is a substantial casting & mine still feels as reassuringly solid in use as it did when first set up around 7/8 years back. :^