This is a great idea for those who never had the chance to get the figures in the 70s/80s and for those who would like to display figures in pristine condition (just imagine, you'll be able get a non-yellowed Stormtrooper again!). In addition it gives you the chance to display these as mock-ups and keep the classic ones safely in storage. You could also use them to close gaps in your collection and use these instead of going broke on the aftermarket. The figs should be easily identifiable by the date stamp, 1997 (there was a four-pack and I'm sure they will be re-using the molds) or 2019. There will be a size difference as well because of production differences (the 1997 figs were a tad smaller, I may have read that the new ones are a tad bigger). In addition, they might smell differently (NO KIDDING!). I think the Retro badge is a sticker because it is not in the same place on the cards.
Unfortunately this line was not offered two years ago to celebrate the 40th anniversary, so we have a missed opportunity here. Accessories might become an issue. If the new weapons are not distinguishable from the classic ones they could be easily mixed up and sold as "originals". Technically they are but they are not the originals from the 80s. I suppose the casual collector / fan won't care but there might be collectors who wish to pair vintage figs with weapons from the same era.
Customizers get more "cannon fodder" and don't have to use vintage figs for their creations. That's definitely a plus.
Thankfully I have all the vintage figs I want, I don't have to worry about getting repros because I got everything from legit sources at a time when repros were pretty much unknown, so this offer only appeals to me when it comes to getting pristine additions (I say "additions" and not "replacements" because I don't intend to replace anything; well, because of nostalgia). My Stormtrooper, Snowtrooper and Hoth Luke have discoloured badly, so getting a new version with white parts is not a bad idea. Getting them on a vintage style card is a welcomed bonus. The sticker doesn't bother me as much; there are a bazillion of images of the old cards without stickers available in the web which can be printed, put in a folder or hung on the wall.