We know aero-glass effects had been removed from win8RTM, some guys managed to get "full transparency" by the "high-contrast theme trick"; of course, it is just not satisfactory.
Some Time ago, a MS China guy said he would try to bring aero-glass back to win8RTM, by adding back the source codes. It seems he was successful in this task, and he said that he would upload the install files within next week.
For guys who missed aero-glass, they just have to wait a bit longer.
(Notice he used build 8888 for his test runs)