Breville USA makes a variable-temperature electric tea kettle that not only saves energy but makes it easier to brew a delicious cup of tea: The kettle will heat the water up to the right temperature for your tea—there's even a "green tea" button—without boiling it. This improves the tea's flavor in two ways: By avoiding too-hot water and keeping flavor-enhancing oxygen in the water, which would otherwise be boiled off at higher temperatures.
And if you're planning to drink a rapid succession of cups of tea, there's even a "hold" button, so that the water will be at just the right temperature right when you're ready for it.
Sometime modern technology truly does make life simpler.
There's even a "green tea" button. I am impressed.