I don't really trust Google, which I suppose is a problem since I'm still using GMail and Google Search; and if I had a smart phone I'd probably use Android!
If there's anything you won't catch me and most people switching to, however, it's G+. I know a few Facebook whores who use Facebook way too much and will probably jump at the opportunity to set up another parallel account on G+ to waste more time making friends with complete strangers but that's probably the only real switching they'll get in any magnitude.
Google had a tendency to provide software that either didn't exist before, or filled a niche by being free or better in some way. I don't see this with G+, not really sure what they were thinking, it's more of a 'nice idea' than a business plan and will likely prove quite an embarrassing mistake for the board.