I don't know of any after market device that can be used, doesn't mean one doesn't exist though.
But, the glossy screen is available as a no-cost option for the new 15" and 17" MacbookPro
I had a Qs more out of interest and curiosity.
A biology student speaking here....just to let u all know that i am ignorant in computers!!!!!!
my uncle bought a new toshiba laptop and the first thing i noticed was the glossy shine on the monitor/display.....mirror like. I have also seen the same glossy shine on many of the sony,hp laptops at bestbuy,etc. I found it to be comfortable for my 'eyes (with thick glasses!).
I was wondering if they put someting on the monitor, can i put it on the mac monitor ...becoz the mac screen doesnt have that glossy shine.
again, this is not a technical qs..was curious to know if the sony,toshiba... people have something inbuilt which makes it more glossy ??