I think we will have flying cars first. Flying cars are better because you could strap a couple of flying kayaks on the roof of a flying car and take the family out for adventures on the weekends (can’t do that with jet packs). Cheers!
I think we will have jet packs first. They are smaller and cheaper and will get people used to the idea of airborne commuting. However, I think it will be a short-lived fad. People will want to travel with other people or bring their groceries, luggage, tools or whatever with them.