I was browsing (on my PC) for some postal supplies, and clicked on one of the links to a similar product (under 'more options for this product", and was taken to the listing, which was displayed in an entirely new (but not entirely unexpected) way.
I've put a screenshot in the spoiler below, product and seller identifying details removed, but it seems to happen with any listings if I arrive to them from the "more options link", so that may be the case for everyone on a PC if they want to check it out (and haven't already seen it).
The first few things I noticed...
No displayed description except for a fragment of a first sentence and a link to view more (clicking it takes you to the normal format)
No Add to cart button
Nothing but the seller's ID and feedback score (no link to see other items, no link to their store, though the ID and FB score are linked)
I couldn't take a full screenshot, but what's cut off is a panel that shows the item I'm on, and a panel that links to other sellers with the item, and the lowest price available for it.
Underneath that is product identifiers if there were any (MPNs, UPCs or ISBNs only, from what I can tell), then reviews, then the new-fangled Q&A feature.
Posting it as I presume that while this may be a test or something, this is what listings are likely to look like once eBay has implemented all of the measures they need to for collating listings by UPCs.
