Meaning – ‘Down the Shore’ Versus ‘At the Beach’

It's a riff on the phrase "life's a bitch" (meaning life can be difficult and unpleasant) which turns it around into a positive. "Life's a beach" means that, at that moment at least, life was nothing but wonderful for David Beckham and Sofia Vergara. Think about beaches: sun, sand, water, beautiful people in bathing suits ... you get the idea.

I like the Wiktionary definition which is "based on precise facts". Consider the following example:

I earn $9,000 per year and live comfortably, although technically I am below the poverty line.

"Technically" is used to introduce the contrasting observation that although the author considers herself well-off, she is in fact a pauper based on a precise definition of poverty. This use of "technically" to provide contrast seems typical.

I would not agree that "technically" and "literally" are interchangeable. "Literally" refers to the literal as opposed to figurative meaning of a word or phrase.