Lga 2011-3

I was reading an article about Intel's next -E line of CPUs and found it interesting that Haswell-E will be on a socket called 2011-3.  What does this mean?  Will LGA 2011-3 CPUs be compatible with LGA 2011 motherboards?

no they won't be compatible.

no indeed the hasswell-e socket 2011-3 will be on a X99 chipset.