They have a scheme based on a larger address space waiting in the wings. The current scheme is ipv4. The larger scheme is ipv6. Most of the equipment we have installed at our shop for the last 5 years has been ipv6 capable. I haven’t heard the strategy for switching protocols. It might get interesting for a while.
Also, don’t worry about connecting device to your home lan. It is most likely behind a firewall router and has a private address space. That router uses a protocol called Network Address Translation, NAT, to allow all the devices on your private lan to share the single internet IP address which has been provided by your ISP. Your router serves the function of a “bastion host” in firewall terms.
Here comes IPv6!