Well, maybe not too clearly. From our apartment, we only see the rabbit-ear-like cranes poking up from behind the UN Building. And even from the southern end of the island, which is closer to One World Trade's downtown location, it looks like this (click to expand photo).
Not really an imposing tower when you see it this way.
This is what it looks like up close.
|Photo courtesy of Paul Anthony Moore on Flickr.|
In any case, Midtown East (which is next to Roosevelt Island) may get rezoned to allow more Empire State Building-sized towers.
That would have a much bigger impact on the skyline from this vantage point.