The biggest change, and something that could potentially impact developers with titles on the platform, is the inclusion of a number of filters that allow players to hide games based on price, discount, or release type. Now you can filter items shown on your Wishlist by levels of discount like 50% off or 75% off. For instance, wishlists can be filtered between games that are less than $10, less than $5, or less than the user's Steam Wallet balance. Clicking any of those tags will filter your Wishlist to just other titles with that same tag applied. These tags can be used to filter out games by genre, letting players look at all wishlisted games that share the same tag. This makes it easy to find the best co-op games on your Wishlist, or quickly find a discounted horror game. Now your Wishlist will reflect if a game is currently in Early Access, and we've added a filter option to hide those games until they have transitioned from Early Access to full release. That's especially useful if you want to whizz down your list and stick games in your cart as you go - say, when it's sale time. However, this feature is not available for games with multiple purchase options, such as deluxe or complete editions, in case a user accidentally purchases the wrong package. It's now possible to add a game to your basket directly from the list, without having to leap around to the store page first.
More details on the specific changes can be found on Valve's blog.