not sure are you talking about buying products or only buying bitcoin. for buying products with bitcoin is an good idea , if some shops allows bitcoin to buy product directly from wallet or bitcoin debit card is good thing for the bitcoin industry . i seen on this forum some threads mentions about bitcoin debit card and buying products on shop 
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Some of the main problems exprienced by bitcoin users is about "what they will do on their bitcoin". We all now that as of today bitcoin have so many limitation regarding to transaction. And if theres gonna be a shop that will accept bitcoin thats a good thing because no need to convert or to cash out money. Its more faster transaction than ever. One thing to make sure that its going to be legal . So that many buisness will be open to accept that kind of thing..