This particular idea is something I was talking about for site 2 of the Empire Station redevelopment, where there are two large towers planned around and over an open plaza. I think that space needs to be more than just an open plaza, Something with a glass skylight to the station below would be nice. If something like this were built on the current PA terminal site, it would be a HUGE improvement, and would go a long way toward connecting the Hudson Yards area with the extended Midtown area of Times Square. Not to mention eliminating the ugly ramps to the terminal.
https://www.6sqft.com/port-authority...-bus-terminal/