1. Cancer lab meat.
It might be a good idea to make lab meat out of cow cancer muscle cells.Think about it, cancer cells are made to reproduce like crazy, so it might be a lot easier to make lab meat from cancer muscle cells, compared to using healthy muscle cells. And there has been precedence: the HeLa cells, famous for reproducing easily, are cancerous.
But when I searched, I cannot find any prior art on this. All that I could find were like "does steak cause cancer" and irrelevant.
Why it won't sell well: As rapid and cheap as cancer cell reproduction might be, it's almost certain that they won't make any structure. Tumors tend to be highly disorganized globs, completely different from healthy muscle tissue. As such, it would probably not taste like steaks. The only use would be for meat sludge, as used in meat nuggets, meatloafs, and meat stuffings.
Also, because of how consumers would be scared that eating cancer would give them cancer... even if they don't know that cancer isn't infectious, and they drink secretions from female cow's mammary glands without fearing of turning into calves themselves...
