They will replace the existing core Haswell chips at the same price points
With the string of events in place, it has become quite likely that Intel is going to launch its Refresh line of processors of Haswell sooner than we had expected and sooner than Computex 2014. Some information has come our way from the sources in the IT retail and from what we know from them, these chips by Intel could enter the market as early as the 10th of May and these chips are going to be led by the Core i7-4790K.
This also means that new socket LGA1150 motherboards should also be launched round about the same tinme and they would be based on Intel's Z97 Express chipset. They would probably come within one week of the launch of the chips. As comapred to the existing core Haswell chips, the Intel Core "Haswell" Refresh processors are comparatively going to deliver better performance at the existing price tags which means that these new chips are coming as a replacement for the existing ones.