High megapixels don't help that much, but bigger cameras always take better pictures.
If you can easily fit it into a pocket, then it's not good enough.
And if it has a built-in phone, then don't bother at all. It's a phone with a camera function that can just barely compete with the worst of the low-end webcameras on the market. Except that I got my ancient Creative webcamera to take better close-ups.