The security that a smart card provides would actually prevent a product like this from working because one of the primary purposes of the chip system in CCs is to prevent cloning, but this relies on simply being able to enter your CC number into it.

I can't remember what it was called, but I remember reading about something that does use a chip card and allows you to switch payment providers using a phone app, but they were actually acting as a payment processor and had agreements with the card providers that they support to redirect charges to whoever you had selected at the time.