Andrew House, the head of Sony's PlayStation division, said that the company is still struggling to keep up with the demand for the PlayStation 4. Speaking at GDC (via WSJ), he said that the company expects this imbalance of supply and demand to continue into the Summer months.
“We’re struggling to keep up with demand,” which has been highest in the U.S. and Europe, House said. “Conservatively, as we get into the early summer months, we’ll be closer to a full supply situation.”

Since its launch in Japan, it seems as though Sony has been better at getting North American retailers fresh supply. Previously, the Now in Stock page for PlayStation 4s was a sea of "out of stock" notifications. Now, it at least looks like some bundle deals are starting to stay in stock for longer than a few minutes at a time.