yes, temporary. i've enjoyed the feel(smooth, non-tacky) and look(minimal reflection) of the power support anti-glare and wouldn't mind another set for the iP4.
screen clarity is still there, but being an anti-glare film, there will always be a slight loss when viewed particularly in certain angles. the retina display does a fine job cutting through the shield.
i do got my eye on the sgp anti-glare. will wait for more screen shield reviews in the meantime.
yes, this WILL blur the front camera. i have a punch tool to fix that problem.