Hope it will happen much earlier - in 2019 or 2020
well i read about news in hongkong pundi x will deploy 500 x pos in restaurant and also in small retailer to help transaction with cryptocurrency and it will happen soon in this year. So i do think it would happen much earlier in 2019 .
This idea needs to be open in this wide venue of industry, if more adoptions and more project will be introduce and usage will really be adopted it can happen much earlier, crypto followers needs to help opening minds of those people who doesn't have any idea yet of this innovations digital money in form of crytpo currency is another great alternatives for doing payment transactions.