No I won't be buying or playing with them.
They are Fantasy Battle specific. And as such, no matter how aesthetically pleasing they are, they are of no use use to me as I only play 40K.
I used to paint my Clear ones as explosions and roiling gouts of flame. They looked great and fitted the 40K game perfectly. Indeed my "Flaming" Flamer and "Blasting" Blast Templates always received praise from opponents and onlookers alike. An unexpected benefit was that I never misplaced them or had them mistakenly picked up by fellow gamers.
But with the release of the Green Plastic Templates, they were retired. I do bring them out to play now and again, but I really do like the Green ones. They were as innovative when they appeared as the Fantasy Battle ones are now and without their popularity (and commercial success) I doubt whether Fantasy Battle would be receiving such a high quality release.