Oversized sungles?

For my Birthday my best friend got me these amazing Trina Turk "Del Mar" sungles. If you've not seen them they are oversized large sungles. I LOVE them but I am wondering if these type sunnies are on the way out...I seem to be seeing a lot of Avaitor types coming in...What do you think the shelf life of my new lovely sunnies is?