Really though? I mean yes, it's nothing groundbreaking in sound and it does sound dated in 2014, but you're forgetting this was released in 2008. It was released before Lady Gaga became big and dance pop was at the forefront, before Rihanna even released Only Girl in the World in 2010, and instead of listing so many more I'll just say before every popstar succumbed to the temptations of recording a dancepop, generic, radio-ready song. Not to mention that this was the last time Beyonce released a dance pop style song aside from Telephone (which didn't even have a dance pop style in her verse).
So sure it sounds generic but it is not a generic song. Not when it preceded those that made the style seem generic now.