^ Retrofits are not cosmetic. They greatly increase your ability to see at night (safely), while not blinding other people. They do increase the look of your car, but their main purpose is to help you see.
Ebay headlights (projectors, or JDM's, or whatever else) ARE purely cosmetic. They have terrible light output, and will not only make it harder for you to drive at night (again, safely), they'll also blind everyone else if you put HID's in them (even when adjusted, they have much more glare).
As for your wikipedia page, GOOD projectors (the OEM tsx, tl ones) will not produce as much glare as anything else you put in the headlights (OEM's with HID's, ebay projectors, ebay projectors with HID's, ebay JDM's, etc etc.)
If you want better lighting, either put HID's in your stock/oem headlights, or save up for a retrofit.
If you just want projectors because they look cool, buy the ebay ones. But you're going to regret it lol.
And yes, I have ebay lights as well. and yes, I do regret it.