We will almost certainly crisper such beasts into existence and all be replaced with organisms with plastic infrastructure which existing live can't metabolize but thinks our collections of atoms are yummy building blocks.
Think about how often you replace your current laptop.
Even if you are an outlier in terms of keeping tech a long time, upgrading internal components etc, there is very little chance rotting plastic will be the reason you laptop fails.
I've been wondering if wood or some kind of injection molded cellulose product might make a comeback. Decomposing plastics would probably help spur that along.
Oh wait! They use protective finishes to seal out the environment and bacteria that would eat the wood, so it doesn't go bad.
They do the same with aluminum and titanium. Hell, they even do this with steel.
The concept of applying a protective finish has been a solved issue for literally centuries...