Could the success of the Apple iPhone X actually lead to fewer iPhone upgrades in 2019 and 2020? Pierre Ferragu, an analyst with New Street Research thinks so. He said today on CNBC that so many iPhone users upgraded to the iPhone X in 2018 that "We expect a material disappointment in 2019." He adds that even the introduction of a lower priced 6.1-inch LCD screened iPhone model won't make up for the shortfall in sales that he expects.