The Seven Kingdoms hasn't yet invented La-Z-Boy technology. This is
very clear when we look at the king, the most powerful person in the
Seven Kingdoms, and his seat: the Iron Throne. The Iron Throne is made
of the swords of defeated enemies. It was made centuries ago, when Aegon
Targaryen conquered the continent with just his confidence and three
fire-breathing dragons; but even so, the swords in the Iron Throne are
still pretty sharp (44 Eddard 11.21).
This is one of those symbols
(like house sigils and mottoes) that actually has meaning within the
book. As Eddard remembers when he's sitting on the throne, "A king
should never sit easy, Aegon the Conqueror had said, when he commanded
his armorers to forge a great seat from the swords laid down by his
enemies" (44 Eddard 11.2). In other words, the Iron Throne is a reminder
(both to us and to the characters in the book) that powerful people
can't afford to become lazy and comfortable.
Or, how about this?
Is the Iron Throne also a reminder that the enemies of the past can
still hurt? This seems to be just the situation that the Seven Kingdoms
face. (But which enemy of the past is really dangerous: Daenerys, the
exiled princess? Or the Others?)