I think so. Sleep well Termie. Your 3770k is safe for awhile longer! Short of the actual testers of the Haswell we are all taking "stabs in the dark" about it's performance. Personally, I think it will slightly improve over your 3770k on overall performance with better power usage ( yours is great BTW). The big change will be a different mb socket. That's going to require big $$$ to switch over. Suffice it to say your 3770k rig is so fast now, what game can't it run well?
LOL, thanks, guskline. Maybe a 3770k should be your next upgrade!
Honestly, each of the past few generations has been just an incremental jump, although when overclocking is taken into account the gap widens a bit between, say, Yorkfield and Nehalem, and then Nehalem and Sandy Bridge. I expect Haswell to be the smallest jump in a while in either IPC or overclocking, but a big one in efficiency over SB/IB.
And believe me, I absolutely appreciate improvements in energy efficiency, particularly idle efficiency, being provided by Intel. Either of my quads compared to my old e8400 dual core are just night and day in terms of idle energy efficiency.
As an aside, I'm proud to say I just cut 3-4 watts off my 3770k rig's idle power by adjusting the idle power phase management in the BIOS!