So you're saying that, instead of stacking compiled functions as anonymous code, like Higher Order Perl does, you stack strings and constantly evaluate them? Unless I misunderstand your approach, I don't see the advantage of your approach over the approach of Higher Order Perl, which uses callbacks instead of template strings. If you use flat strings, you forego the possibility to have structured data.

As a side point, trying to explain your technique using terms such as "black magic" is not helpful. Any sufficiently advanced technology is indistinguishable from magic, but if you want to get people to understand or use your special brand, you will need to explain the technology or mechanics behind what appears as magic, whether black or whatever colour you choose.