To disappear from view at a speed that is un-noticeable. Watching an object that is receding into the distance at such a speed that you do not realise it is no longer there...
Staring at another person while on a heavy acid trip. The light around them fractures to the point where the dancing aurora meld into a kaleidoscopichallucination and the subject slides into obliviocity.
(n.): the tendency or state of drifting into forgetfulness, either willfully or passively; a slow slide into mental or cultural obscurity.
Too many on the team have settled into a comfortable oblivity, showing little interest in improving their skills or contributing meaningfully to the organization's goals.