HP launches Envy-branded Ultrabook offensive. Last Wednesday, Hewlett Packard (HP) Chairman announced new Envy Ultrabooks but also a new aggressively priced thin and light brand of laptops called Envy Sleekbooks. HP today expanded its award-winning notebook portfolio with thin and light Ultrabook™ systems and Sleekbooks packed. Which boast starting prices that are US$150 lower than ultrabooks. It is available in the United States on June 8 with a starting price of $150.