It doesn't seem like extra feature. End User always appriciate quality rather than look.
Most perfection is required on RJ45 connector and pins which annoys most of user and which is first and last required thing in cable.
However, End User's know that howmuch a cable lasts. To invest in glowing stuff will be stupidity as i don't think anyone works under without light in service station.
Formal casing with extra tough pins and casing will make more impression. Though I like your ideas (Box on such case will look better
)
Best of luck!