Traditionally there are a lot of issues (battery vs. broadcast power vs. non-transmissive material (like fluids)), and it doesn't replace the need for old fashi

Traditionally there are a lot of issues (battery vs. broadcast power vs. non-transmissive material (like fluids)), and it doesn't replace the need for old fashioned inventory management. At best it supplements it, and in a margins game the advantage just doesn't materialize into monetary savings. You do see similar technologies in some situations (RFID), but solving the general opaque shipping problem is surprisingly tricky.