This kitten has congenital cerebellar hypoplasia.
These cats are known for their "drunken sailor" walk, which is why they're known endearingly as "wobbly cats."Via Nothing to do with Arbroath.
Unless a CH cat has other health issues, their life expectancy is the same as a cat's without CH. Since the condition is non-progressive, it will never get worse — and in some cases, owners say that their cats become more capable over time.