@getsource (DH-Shredder) spent some more time over the past week working with @dkoopersmith refining the infinite scroll JS for #19815, which was committed earlier today. We briefly discussed having more results/pagination for some of the other theme-install.php tabs with @nacin (requires changes on the API end), as well as the recurring thought that perhaps the featured tab should show first. Therefore, the other patch that restricted the JS enqueue to the theme-install.php search tab only was not committed for the time being.
After reviewing some comps with @jane, we started on the display of multiple screenshots. An initial rough patch will be up on #19816 soon. We still need to hash out the details of retrieving multiple screenshots, both in get_themes() and from the .org API, and how those images will be added to the extended details div without displaying in no JS, as discussed when first scoping the feature. We also need to take into consideration what happens when the window is resized. Provided that we can get that sorted out tomorrow, it looks like we’re on target for the cycle.
I wrote the Theme Review Team and gave them an update on the anticipated screenshot sizes, which will remain at 300×225 (4:3), constrained by CSS. Gandalf functions as the large screenshot The screenshots in the list table view will be enlarged to match, as there is more space now that details are hidden by default.