There is only way I can see this affect wallets: it's the paper wallets of people which don't reset/clean up properly their computer and printer from traces of those wallets. There were warnings and people are aware that printers' memory can keep the last printed page and for now there are no known viruses trying to take advantage of that. Also the use of paper wallets is not that big, people seem to migrate to hardware wallets (which I think they're safe from this exploit).

So expect such viruses to make less damage than the clipboard alteration type viruses and with bigger programming effort. This means it's not really an issue.