Ultrabooksare set to light the notebook market ablaze, but the two largest PC makers are arriving fashionably late. A Digitimes report collaborates earlier rumors that HP and Dell do not plan on releasing ultrabooks anytime soon. This puts Acer, Asus, Toshiba and Lenovo in particularly prime positions to stake claim in what could become a pivotal market. But they better get while the getting is good. You can bet that HP and Dell are going to eventually bust through the ultrabook wall Kool-Aid man-style.