Not that it's going to happen, but...
WHat I'd really like to see is an aftermarket map light/dome light combination. It would clip into the hole for the stock front dome light, would contain two "push the lens to turn on/off" map lights focussed into the appropriate locations on either side. These would be complemented by a third light that would operate like the current dome light (switchable to "On" "Off" and "Door" settings).
That's what I'd like to see. The map lights in our Toyotas (van, Sienna, Previa and Scion xB all worked along these lines, and we've gotten spoiled as a result.
There there's the whole problem with the missing (from the 451) rear dome light...