The energy for lab grown meat has to come from somewhere - thermodynamics is always king. You can provide it via sugars/carbohydrates which the cells can motabolise, but you’ve got to put energy into making the sugar/carbs which is easiest by just growing some sugarcane/potatoes/etc. There’s more steps for meat vs plant and it’s very unlikely you can make 100 calories of lab meat with lower total system energy input than 100 calories of plant matter. (N.B., I’m a chemist, not a astronomical biologist, so if an expert refutes me and my assumptions, Place more trust in them)

Sarah Connor Chronicals. Was pretty good throughout but then ramped up to off the walls amazing, just in time to be cancelled on a cliffhanger