I agree with the OP. Per wikipedia "A need is something that is necessary for organisms to live a healthy life. Needs are distinguished from wants because a deficiency would cause a clear negative outcome, such as dysfunction or death."

So, we certainly don't need Android on the N900. Hell, I don't think I even need the N900. ".... a deficiency would cause a clear negative outcome, such as dysfunction or death...". I take it back, I need the N900.