Don Park rediscovers "demassification" as John Seely Brown and Paul Duguid termed the effect in a paper called "Borderlands". In short, a physical newspaper has the nice property that if you and I have seen the newspaper, even if it's different copies, we've seen the "same" thing. Thus references to elements of the paper are consistent across its various instances.
This all falls apart for personalized online "newspapers". Eventually we'll discover that these things are a new and different service. Starting from newspaper principles, conceptions, and expectations is fine, but we'll have to make a new understanding of the way they should work.
Caveat: newspapers used to issue multiple editions per day so the demassification argument only goes so far. TV broadcast is harder to demassify, although with TiVo and intermediaries like it probably being cooked up in somebody's lab even that medium is under assault.
Memo to audience: I'll fix up the Seely Brown/Duguid reference when I get back to my office.