I read this too before we purchased. While it’s true, the actual impact to your pocketbook is pretty trivial:
Our friends at HD Guru did some analysis to determine if there is the real difference between “energy efficient” LED models, and “power hungry” plasmas. According to HD Guru, the LG 47-inch 47LW6500 LED LCD will have an EnergyGuide yearly estimated cost of $13. While the LG 42-inch 42PT350 plasma will have an estimated cost of $21.
LED TV
Power Consumption: 67W
Yearly Electricity Cost: $13.39
Plasma TV
Power Consumption: 136W
Yearly Electricity Cost: $27.25
As you can see in the chart, a plasma television does cost more electricity than an LED TV. However, the resulting cost at the end of the year is not very big, about 10$ more for a 50" plasma. On a 5 years period, the total amount saved would be 50$.
We also have a new[er] Sony LED set, it’s a mid-upper model, good, but still prefer the plasma downstairs.
The playroom has an old Toshiba RP, now that’s a beast in terms of footprint.