power wall

noun3

1. •
   In retail selling, a large, visually appealing display of products intended to attract the interest of customers.

   • The new layout features a "room solutions" orientation, navigational signage, lower-profile fixtures and "power walls" for key categories like towels. — 2007
2. •
   (Canada) Behind retail sales counters in jurisdictions where tobacco advertising has been banned or heavily restricted, a prominent, enticing display of tobacco products.

   • When you go into your local convenience or grocery store after May 31, 2008, you'll notice the "power wall" displays of tobacco products behind the counter are gone. — 2008
3. •
   The rapidly increasing loss of efficiency due to overheating as the power/speed of a CPU increases.