A:AnswerI'm not a gamer but I think so.
I would expect it to last as long as it is not abused. It seems better than a lot of the store or lesser name brands.
A:AnswerIf your singing machine has HDMI, Composite, or Component outputs then it probably will.
Check with the manufacture of your singing machine for output options for your device.
A:AnswerNo, you'll need to buy a separate wall mount. It has a standard 8"x8" hole pattern on the back for mounting to a TV bracket. TV is light and easily placed on wall.