Aging Titan and GTX 780? I know computer hardware depreciates quickly, but I had no idea that $1,000 flagship video cards are now considered "aging" seven months after their release.
Aren't Titan's still going for $1,000+? And the rumored MSRP of the R9-290X is $600. Assuming that the rumored price remains true, you can hardly say that $400 cheaper for similar performance just "a little bit less money".
Uh, I'm pretty sure getting Titan level performance for slightly over 1/2 the cost of a Titan would be incentive enough for most people to purchase one.