I don't see this happening any time in the near future. The extra hardware cost is nontrivial, and there's a software support burden. Cellular bandwidth also isn't free, and probably wouldn't be covered by the value of any ads/telemetry that it carried.

Hopefully? I mean, adding the cell modem is sort of hypothesizing about the future, and if we're already doing that then we might as well also hypothesize that such a future google tv will refuse to display anything from its hdmi inputs until it successfully phones home, and that that happens weekly.