Alcobas translates to "bedrooms" or "chambers." While seemingly simple, it's a more poetic and slightly archaic term than the common "dormitorio."
In the song, the phrase "anda suspirando por las alcobas" (it goes sighing through the bedrooms) evokes a sense of mystery and intimacy. It suggests that whatever "it" is (the "qué será?"), it's a pervasive, almost ghostly presence that touches the most private spaces, making the word feel intriguing and evocative.
"Oh Qué Será" is Willie Colón's take on one of the biggest questions in Latin music: what will happen to us? The song opens almost like a mini sermon, the singer saying he believes in plenty of things he's never seen, so why not believe in this too, even without proof.
From there it turns into a list of everything "qué será" could be. It lives in the daydreams of lovers, in the songs poets write when they've had a few too many, in the everyday grind of people the world usually looks past: the drunks, the outcasts, the sex workers, the bandits. It knocks at night, makes you tremble, and refuses to give you a straight answer.
That's really the heart of the song: fate doesn't explain itself. It shows up everywhere, in everyone's life, rich or poor, saint or sinner, and all anyone can do is believe in it or not. The repeated "¿qué será, qué será?" isn't a question looking for a real answer, it's the sound of a whole neighborhood shrugging at the mystery of what's coming, and dancing to it anyway.