@AC: " I do use my TV's 'smart' tv functionalities over the (same)ones supplied by say, my Xbox, simply to save the 5p in energy costs from having it draw 150W over a 2 hour movie"
Many devices are now dedicated to this purpose and use far less than the XBox. The AppleTV, for example, draws only 6 watts in use, and vastly less on standby. A 'smart' TV could easily use that much more power over a 'dumb' display if it has to support WiFi etc. The software is kept up to date by Apple, and it's no great hassle to replace if it dies (unlike replacing the whole TV set!).
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@AC: " I do use my TV's 'smart' tv functionalities over the (same)ones supplied by say, my Xbox, simply to save the 5p in energy costs from having it draw 150W over a 2 hour movie"
Many devices are now dedicated to this purpose and use far less than the XBox. The AppleTV, for example, draws only 6 watts in use, and vastly less on standby. A 'smart' TV could easily use that much more power over a 'dumb' display if it has to support WiFi etc. The software is kept up to date by Apple, and it's no great hassle to replace if it dies (unlike replacing the whole TV set!).