I am younger, but old enough to remember when EFI came into the mainstream. I remember people saying that the car would not make it 10 years because of the electronics, people calling it "fuel Infection" ect..
Aside from a vehicle that is extremely high maintenance, or had a serious design defect, I would see no reason a car purchased today will not be around in 20 years.
We have a 13 year old van with VSC,TC, multible airbags ect, and I see no reason why it wont make it 7 more years.
If there is a large number of touchscreen failures, the aftermarket will step in and make replacements. They always do.