In New York City, buildings aren't rent-controlled (or rent-stabilized); individual apartments are. I highly doubt that any units in my building are rent-controlled (that's very rare in NYC these days). There may be one or two that's rent-stabilized, but given the neighborhood and the tenancy of the building, I doubt it.

> I think availability, speed, cost, and quality of Internet access will have an impact on property values.

In New York, that's vastly dwarfed by the many other factors that affect property values. As much as you and I think Internet access is important, most NYC tenants care more about location, bedbug history, sunlight, etc.