Soon..Not likely
Kepler is still in its infancy, expect a late Q3 2012 release, possibly even Q4 2012.
AMD pretty much has the top tier market sown up for the next 8 months.
Only thing I can say is if Nvidia dont release the cards sooner than Q3 then they probably going to lose a lot of business to the ATI cards. I must admit this new ATI card is 1 sexy beast and even though I really don't like the ATI cards, there has been a ton of brands that I used to steer clear of and now I religiously support them(ok almost religiously) and I am now considering trying ATI out due to the slightly cheaper/better performance concept.