As a logistics expert, I have to agree with you about RFID, and the very slow uptake. In some ways the use case for RFID (which are more costly than the effective zero cost of barcodes) has not been strong enough for very widespread uptake. Blockchain in secure logistics chains has real appeal. WIll the combination of RFID and blockchain create a tipping point for RFID uptake? Maybe.. and the repurposing of older tech into new tech is where most innovation breaks thru'.