Digital Signs or AR? What becomes mainstream first? You can see digital price tags in Big Camera (Best Buy equiv.) in Japan. These digital signs could introduce interesting economics in physical stores, like dynamic pricing, personalization markets, etc https://bloom.bg/3CXBSqv

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Practically; digital signs make sense when you want to broadcast controlled information, and AR makes sense when you simply want to validate it when required (like QR). Far less infrastructure required for the latter too.