That's not useless. That's a very good superpower. Someone tries to mug you? Control the glass in the windows to shatter into lieces and gut the mugger. Good guy tries to stop you? Break a bottle and send it into their throat. Wanna look cool at the bar? Control the glass to slide smoothly over to the lady in the nice dress. Controlling glass is a very useful superpower.

The power to be a very unpopular Minecraft youtuber.