pointed out to me elsewhere by @Ignatius
also it shows free on the main store page.
Just Starcraft is remastered to 4K for now and from what I gather but Brood War is in the works.
I revisited these a few years ago partially curious to see if they would play on win10 x 64 and they did mostly. I was actually quite happy to see it holds up as the game play and story more than make up for the dated graphics which still look pretty damn good if you ask me.