How can we make sustainable homes as comfortable and maintenance free as modern conventional homes?

Sustainable homes sound cool until you try building one and staying in it. Given our modern lifestyles and expectations, sustainable homes, as they stand today, might not provide us with the plug-and-play, zero maintenance experience. A future sustainable home could, however, be able to do much better. What are the avenues, concepts, technologies and solutions using which we can make homes sustainable such that that hundreds of millions transition to sustainable homes?