Exactly - the title and the article is incorrect. Americans will still be afforded a visa-on-arrival for tourism and other approved short term stays. Additionally, the authorization is valid for three years and can be used for multiple stays within the EEA. I believe the UK is also implementing an ETA (edit, maybe I got the acronym right this time), but I think it is only valid for two years at a time.

In a way it’s silly, but it also reduces that chance of a disruption/entry denial at the entry point to the Area.