We're talking about like games at Japanese department stores? Ones where you spend 100 Yen coins to play and print out cards as loot drops or monsters that you collect to use and keep steady progress? Because if we are, I would die and go to heaven if I could play Dragon Quest Victory Road on my phone in English instead of only in Japan, I had a ton of fun with it.
Most players keep a digital library of their cards through the barcodes anyway, so it would be cutting out the middleman, with the obvious loss of cool cards to print out and keep. I would be down to have These type of games show up on phones, honestly.
If you mean like those Megaman Battle Network toys, that would also be rad, to have an inventory of cards and barcodes and stuff for these consolidated onto the phone, while still being able to collect and use physical items. I would also be down for those.