We have never had a more anti-gun president/vice president team in the history of America as Obama/Biden. Combine that with a Democrat super majority in Congress (likely to happen), and every left wing policy imagined by someone with a D next to his name will simply be rubberstamped through with no opposition.
Will Obama confiscate guns? Not directly. I think he will ban new sales, ban importation, and tax ammo out of reach. When that is over with, I expect him to push for signing an anti-gun treaty with the UN in the interest of "creating global goodwill and restoring America's reputation".
On his own, I wouldn't expect any significant gun control, but this is the perfect storm for destroying gun rights.