The aggressive pricing of Envy Sleekbooks could be AMD's way to lure buyers away from the more expensive Ultrabooks, McCarron said.

"The price is a continuation of what we've seen in the past: AMD tends to price laptops aggressively," McCarron said. "What all of this is underscoring is the evolution of laptops. Guess what, they are getting thinner."

There are size and weight distinctions between HP's Envy Ultrabooks and Sleekbooks. The Ultrabooks feel lighter than the Sleekbook laptops, though both are extremely thin and lightweight.

The Ultrabooks are also slightly thinner as HP tried to stick to specifications set by Intel, said David Conrad, director of product marketing at HP. Ultrabooks cannot be more than 21 millimeters thick, according to design criteria set by Intel.

But Sleekbooks are comparable to the Ultrabooks on battery life, which is between eight to nine hours.