They may announce a product-not necessarily an entire 'Apple Car', maybe just a partnership with an existing manufacturer- but it will probably take 5-10 years from the 'release date' before something is actually available. Even if EVERYTHING in software is rock solid and all of the hardware has built in redundancy for safety, when someone gets hurt or killed using or by one of these things there will be messy lawsuits. This problem isn't Apple specific, Tesla, GM, Ford and everyone else developing autonomous cars will want to know what the legal rules and liabilities really are, and how blame can be assigned to someone other than themselves.
Other than 'test vehicles' that the government allows exemptions for I don't think autonomous cars are in a 5 - 7 year time frame for public availability. It's not the technology or software, it the legalities.