Low stocks of some current MacBooks models may indicate that Apple is preparing to refresh its laptops, and may also support a rumor that new 13- and 15-inch systems will ship by the end of the second quarter.
Source: APPLE INSIDER

Aggregating the Future
Low stocks of some current MacBooks models may indicate that Apple is preparing to refresh its laptops, and may also support a rumor that new 13- and 15-inch systems will ship by the end of the second quarter.
Source: APPLE INSIDER