Nicolas Bacca discusses the future of hardware wallets and key improvements that can be made. Hardware wallets today focus on basic transaction confirmation but have limitations in more complex use cases like merchant purchases. Ledger proposes expanding functionality through an open LedgerOS that isolates secure elements and allows for customized confirmation UX and support of new assets. Lessons from smartcards on lifecycle management and isolation can be applied to build hardware wallets correctly from the ground up with key protection and integration of secure, pluggable applications.