Everything is on the table and everything has to go. China plays the game of empires well- threaten by proxy in war, threaten by trade by having your opponents subsidies their own demise by systematic competition, without triggering the bite reflexes of systemic competition. Then get them to disintegrate by forming self-harming alliances.
Could still advance on physical buttons though. Have a huge touchscreen- and the buttons just drive on it via magnets- having little displays on them. That way, a set can be fixed function- and others can migrate with the purpose.