They probably meant "a reasonable amount more". My understanding is that the digital signage/commercial displays are substantially more while often being lacking in features that are important to most consumers. I'd probably also be willing to pay a little bit more, but not very much since, at the moment, unless you are really paranoid about your privacy/spying to the point that you don't want the TV to even have the connectivity hardware at all, most of these issues can be solved by just never connecting it to the internet, having it default to immediately selecting on of your inputs (I don't know how common this feature is by my TCL can do it), and using whatever device you choose on that input.
