16 hours daily usage?! Whoa nelly, that's a lot of TV watching! I suspect a lot of people on here (like me) watch less than one hour a day. The US national average is five hours, which is still startlingly high, but doesn't get you close to 16 hours per day even with multiple people in a household (as their viewing times will tend to overlap).
I suspect that stand-by power usage may be more important than active power usage for such a device. And I don't know how Roku fares for that, nor its alternatives.
The point of the disillusionment exercise was to carefully select parameters that favored narrowrail's perceived "advantage" in an improbable but still realistic way.
In other words, assuming a proverbial couch potato got a sweet deal on a new Roku 3 and pays up the wazoo for electricity, it would take a solid 4 years of usage in the prescribed manner before breaking even on a relatively small investment, rendering any perceived power savings "advantage" over an existing 20W system null...let alone other considerations like product MTBF, lifecycle, the next trending 6-second attention getter, interoperability, etc.
I suspect that stand-by power usage may be more important than active power usage for such a device. And I don't know how Roku fares for that, nor its alternatives.