@pacingpoet, to some extent yes. The project is driven by advertising revenue. So if you remember the ads on the old pay phone booths, each link replaces one pay telephone booth mostly. So the ads that run on the 55" TV displays are mostly the same ads in print that were on the booths. The project is completely free for NYC residents. The cost of the Link project ($200M) is generated entirely by the ad revenue which means they are going to be more saturated in high population, high retail and business locations. So yeah, there will be a ton of them in midtown, 3rd ave, 8th ave, etc. And the heavy retail aves in the outer Boros - 5th ave in Brooklyn, Queensboro Plaza in Queens, Grand Concourse in the Bronx, Hylan Blvd in Staten Island.
True there aren't many in the residential areas because there's not a lot of people or business. For example in the Bronx, there are few Links planned for the Riverdale section of the Bronx (up by the Cloisters) where the homes range in the $3-5 million scale. Inversely, there are already tons of Links, and more coming, in Harlem where... well we don't have to talk about Harlem. So the layout is not necessarily rich/poor.