Only to the case type you are opening. I did so with a few regular cases I had to see what it would look like before opening the last 40 of my dickens cases.
I was able to then open all of my dickens cases separately with the same option.
Welcome addition I must say.
EDIT:
I feel like the option could use one more layer of polish though, rather than just show each one opening and moving up across the screen, it could perhaps give you a label for each rarity and a number representing how many cards you just opened that fall into that section like so…
Total Opened: 30
Lead: 25
Iron: 3
Bronze: 0
Gold: 1
Cobalt: 0
Special Edition: 1
It could then allow for you to click on each rarity type and let you inspect each card in that category. (with an option to move back to the opening results again)
Once you are done looking you could close out of the screen via something like a “Close Results” button.