I don't see any benefit compared with other crypto debit/credit card, so i doubt this product will be popular. New user is more likely to use card from more popular company (e.g. Binance) while veteran user would use card which already ready to use.
Well, in case of Ledger card your crypto will be on your hardware wallet and not on the exchange. For me that's a pretty big advantage, given that their fees and ease of use remains somewhat similar to Binance card.
Honestly i doubt about part where the coin stay on hardware wallet since the website also say "
Top-up & manage your card easily and securely through Ledger Live". Hopefully they don't mean you must send coin to card first so the card automatically convert the coin to fiat at time of purchase.