New connector that incorporates more than just power connectors, perhaps for sensors that adjust temperature, or can detect changes in juice viscosity or overall chemistry (like e-85 vehicles can adjust engine performance based on whether e-85 fuel or normal unleaded is used), maybe they will get rid of coils all together and opt for using an expansion valve and orifice tube (like A/C units use) to convert the liquid to a gas, but on the same line of thinking just sell small compressed tanks that will deliver a metered dose (similar to medicinal inhalers), who knows, one thing I am sure of is, it will be done in baby steps, not because the technology doesn't already exist, but because they can capitalize on each small improvement.