Mobile & Apps: "Ever since Microsoft launched its Bing search engine to compete with Google search, there have been many comparisons of the two. Admittedly, initially Bing was a disgrace when compared to Google search, but slowly as the years passed by; Bing has risen to the challenge and have actually surpassed Google search in terms of accuracy and other things."
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And google's the one who actually started using bing's extended interface (the side stuff: movie times, baseball/sports events displays, travel stuff,etc.) and incorporated it with their stuff. Google may dominate the search business, but bing's innovations and extra stuff has actually driven google to put all that stuff with their engine.
They usually just aim their tests at portions where they think one of the search engines will likely fail and pin it against it. Now, if they further generalized the test, I think we'd have a different story.
Social integration: Debatable as to being a good feature - I don't need to see my friend's stuff pop up when I'm searching for a website
Xbox 360 Kinect: Only useful if you own a 360. It's generally faster and more accurate to type it out if you're on a PC.
Product Search: You must not know about Google Products..
Bing it: Sounds weird. Google it sounds better.
Technology services tend to have a limited run before being replaced over overrun by upcoming competitors.
For example, take a look at sony walkman and apple's ipod history. Or, Android up against Apple.
The cases may not explicitly compare with search, but you can see how things have a limited dominant run.
grammar isn't one of my strong points. ^_^
I used google until 3 years ago when i started using bing and i have never gone back to google.
But with windows 8 windows phone 7/8 and xbox all using bing as there default search it will start to eat into googles market share.
But something new will come along and have a go at the top sometime in the future.