I have a screenguard which is partially matte. I mean i can see my own reflection on the screen (more when it is off) but not too much. I have a proper matte screenguard on my iPhone 4S and i see almost no reflection.
As of now i am not really keen to change the screenguard on mine but i will take care of this thing in future.
@Vagabond had got a matte installed on his Nexus from a shop, he may be able to tell how "matte" his matte screenguard is.
then mine also seems to be a similar case. the package too has a sticker of 'matte for nexus 7', albeit i can also see reflections on it when the device is off. i chose a 'sasta waala' over a 'mahanga waala' on ebay, and now i wish and hope that i don't 'roun baar-baar'.