Agreed Facebook is just another MySpace. Once people find somehting better it will take over. Doubt it will be Google+ and doubt it will be real soon but it will very likely happen
From what I understand the comparison of the two would be apples and oranges. FB seems like they are taking their formidable strength regarding social interaction with their users to introduce a very hyped version of Yelp. Google will of course still reign supreme in online search.
Facebook is the giant of social world and no one denied that. It has working from a great time and always introduce something new and amazing. when we look Google + than at first it has the same idea like facebook but with the passage of time, the Google plus is turn out into a new world social media. Facebook is use by everyone but when you come to Google plus you will get most thing in same scenario but with a great difference. Google Plus moving toward business and also toward seriously people which want some thing learn or delivered!! In near future Google plus will cross facebook so much that people will raise a question that.. will facebook is ever compete with G+. Google plus and facebook at this time, has two different ideas and you can easily get the idea from the user who using them!!
If it's about social sites, then no. That's why google searched for an other niche to develop their G+: now they're competing with linkedin. But google has other pluses facebook won't achieve soon, like the most evident one: Google Search or G+ posts, accounts or pages that rank better in the search engine.
I find G+ is useful for networking with people with the same interests. It's not a great social site.