I like to think that William Blake summed it up nicely 200 years ago when he said:
"You never know what is enough
until you know what is too much."
If you want a golden rule that will fit everybody, this is it: Have nothing in your houses that you do not know to be useful, or believe to be beautiful.
The computer so readily pairs with futurist visions, pushing forward futuristic, technology-oriented aesthetics. But the reality of our relationship with digital technology always retains this messy pulsing humanity. Marshall McLuhan predicted computers in every classroom, people connected around the world, utopian vibes. Technically he was very right, but we still have bad carpeting and ugly plaid couches and gas station tchotchkes and dirty bathrooms. Regardless of time passing, we remain in communion with the century preceding us, and even the previous millennium or two.