You know what would give us really good Google Plus integration? If Google plus tied into your Gmail when you want to attach a picture. Imagine when you want to send an e-mail from your Gmail account with a picture from your Google+ account. You simply click on "attach file", and then browse to the pictures that have been uploaded to Google plus.
This in effect means that you can take pictures with your phone, let the settings automatically post to your Google plus profile, and then have those pictures immediately available for Gmail to send to other parties that are not Google plus. Or just because you want to send them as attachments.
This would be so useful for realtors, architects, even photographers scouting out a new location.