I know I could be ripetitive and all, but the most scaring thing about Vita is not the actual LTD, but the incidence of the launch.
In the past generations, we've seen the losing console always starting with a low profile launch ( 120k for the Gamecube, 100k for the Dreamcast, 80k for PS3) and then selling lower and lower through time. But Vita had a respectable launch, with 325k units sold and then...a scary collapse. Basically, Vita is now behind Dreamcast despite having a launch more than 3x than Dreamcast / 4x PS3. THIS is the most scary aspect of Vita sales right now. Not just the terribad numbers, but how it progressed from launch.