As a stop-gap before pagination (and maybe a good idea even after), the wishlist screen should move items on sale to the top. Otherwise you break the sales funnel–you get "item on your wishlist is on sale" emails but when you pick up your controller the item on sale is not there.
Have the same issue. Right now it shows only 40 wishlisted games. This means that using SteamOS it is impossible to see your whole wishlist.
The current Big Picture Mode allows you to view the whole wishlist.
Closing per the last comment.
Nothing extracted yet.
It would be nice if we could have full control over our wishlist inside Big Picture mode. A good start would be the ability to see all of the items on our wishlist. Currently it limits it to something tiny like 20 games or something, with no ability to page through the rest.