It depends on what you drive in how the finish will hold up. If you drive in snow with road salt or even sand it can pit and chip and dull/tarnish if you don't keep them clean and protected. The key to keeping any of the finished looking good is to clean and protect. Wax the rims like you would the cars' paint and they will look good for a lot longer.
Finishes this is where pics help.
The one I don't have pics of is Powdercoat. It looks like paint is much tougher than paint, a bad but easy example of powder coating is file cabinets are sometimes powdercoated. Same type of care as you would with paint or chrome.
Hubcap on my Painted Wheel is chrome as is the wheel you see in the reflection. I know you know what chrome is, but I thought I would show a custom painted wheel too..
This is LiquidPT wearing Painted silver wheels also could be called Hyper-bright wheels. I looked on a few sights and the pics I saw looked his wheels so I am guessing its another name for a bright silver.
This Mike-in-Orange's PT wearing a painted wheel with a polished lip also could be called Hyper-dark.
