I sent an inquiry to Zagg about the Droid Turbo specifically and this was their response and, even though it has a person's name attached to it, it's probably canned:
"Thank you for contacting ZAGG! My name is Christian and I appreciate your interest in our products. Unfortunately, it appears that we do not have any information about an invisibleSHIELD to become available for this particular device but I am able to suggest that we make it available. You are welcome to check our website for any updates on the availability of this product because we come out with new invisibleSHIELDs often."