I haven't seen tried-and-true "resort collections" here in years. (I DO have vague recollections of "cruise wear" at The Bay & Simpsons - dept stores, one now defunct. Basically it consisted of dressier-type summer clothing & swim wear.) Could Resort be an umbrella term in the fashion/retail world for out-of-season summer clothes, sold in locations where we experience cold weather 7 months of the year and need stylish summery stuff to wear for yes, tropical trips...?
I've been to several resorts in winter months, and guests are usually just in summer clothing (and fancier stuff at night), although the more senior-aged guests seem to be very well-pressed and matchy-matchy beyond what you'd wear lounging around in the sun/buffet-eating/latin music listening - so maybe true "Resort" wear is for the older generation...? I just brought sun dresses, coverups, bathing suit, and dinner-appropriate items (always a dress code). Cuba is HOT.