Some phones and tablets have varied bezel width because they are touch-screen devices that need to be held by their screens.

In my experience, most TVs and laptops have uniform bezel widths. Especially TVs since they are so commonly treated as furniture, and therefore receive a great deal of design attention. On laptops, an exception is often the bottom bezel, where you often will see some additional surface material.

I agree with GP that laptops should have uniform bezel widths to look their best. It's not a must-have, but a uniform narrow bezel is optimal for laptop aesthetics.