I don't see how it can be worse. "Energy to create the nutrients and maintain temperature for the cells" is something both the chicken and the lab have to spend. I'm happier to have a lab create meat from the cells up than farmers doing their best to create sacks of muscle that can't stand up with a poor little head poking out the top, "full-grown" and killed in six weeks. Both are working to be more efficient, but it doesn't look as good on a living being.