Re: Those "6 months" are your advantage to make money, eejit.
They used resistive to get resolution. The low resolution capacitive existed at least late 1980s. The "holy grail" was handwriting and annotation. Because only BUSINESS users could afford the data.
Apple did deals for cheap data contracts.
They used 1980s gesture ideas from a bought in company (Fingerworks?) married to a cut down OSX to make iOS. The first iPhone was Samsung 6400 series ARM and commodity hardware. 8 years is 8 years WATCHING till they could do a phone by only some GUI development and commodity HW.
Ives then slaps it into a Dieter Rams inspired box that Braun would have done in 1959 if smart phones had existed.
Then MARKETING plus the first attractive for CONSUMER contracts.
The whole Jony Ive story is a fairy tale.