Bars, restaurants and supermarkets have glass fronted refrigerators and freezers the world over, and yes, most are double glazed.

They're just less efficient and more likely to break. In a commercial environment that's worth it to show off the contents, but the trade off is different in a domestic setting.

I mean, supermarkets have huge freezer and cooler cases with no doors at all. The efficiency loss is just the cost of merchandising.