In no way whatsoever is Kinect comparable to the biggest tech flops of history, as you argue. How can you equate Kinect 360's gangbuster sales and profits to the DOA Kin phone??
The reason its a bigger flop than Kin, is cause MS tried Kin it didnt work out and then abandoned it,
they did not repeat the same mistakes and bring out a Kin 2, they actually learnt their lesson.
This is exactly what MS done with Kinect 2 with the Xbox One, like I said in a previous post Kinect 1 was worthwhile, as it was them experimenting which is often worth a gamble, True they never released a single compelling/must game that used the tech. but OK.
So after failing to prove the necessity of kinect with the xbox 360 or a compelling reason to have it they then decided to include it in every single Xbox one, which
1. increased the price
2. decreased the consoles power
3. greatly reduced the number of places they could sell Xbox one in (IIRC only 8 countries or something for months)
perhaps these 3 things wouldnt of been so bad if they kinect had a large benefit to offset them, but it didnt and there were no indications that this would change, they had been working on kinect for what? 3-5 years before the xbox one (*).
They then release the xbox one with kinect bundled, yet no compelling reason why its there (the only reason I heard from ppl on forums was voice commands which could easily be done with a mic built into the console or plugged in, no need for kinect at all)
You and I would be expecting, "oh they must be working on some amazing stuff thats gonna show why kinect is a must have" yet months/years later, nothing compelling. This is why its a bigger failure than Kin
(*)the latency was the killer, the #1 reason why it failed as a gaming device, if they could get that down to mere milliseconds then you could make valid reasons of using it as a game device, I knew this years ago, so why didnt the Xbox engineers? Its not rocket science