It will be nice to have a new option (same level than 'Direction', 'Zoom', Read more') : Streetview.
When you click on this option, you open a new Infowindow with the Streetview inside (and can you have the option to zoom it).
For example, if the hotspot is a restaurant, you can see the restaurant view in the Infowindow. Very easy to find the place.
Of course, you have to add new fields to display the streetview info (yaw, pitch and zoom --- and probably also the longitude and latitude that are a very little bit different).
Example : http://gmap3.net/examples/street-view-info-window.html