If we see increases much larger than that or something unexpected happens then all bets are off, but at that sort of rate it'll be chipset/peripheral connectivity etc that will become an issue for a lot of people before raw CPU performance.
7x faster for people that don't need that level of performance? They still won't care.
Give us something really different. I've been really excited by the prospects of 3D XPoint because of the potential. If they can advance that tech in the future, this is what should happen.
Super fast DRAM with small capacity acting as sort of a cache + 3D XPoint Gen xx acting as general RAM and Storage replacement.
Software taking FULL advantage of the new memory hierarchy.
-Instant boot computers. No more worrying about sleep modes, because full boot is near instant
-Instant loading of applications and files
-Instant management applications(like virus scanning)
-Games with massive worlds and textures with no loading times
No more constant moving data between RAM and storage would probably save significant power as well.
In fact, this is what the Intel patent that was related to XPoint and future talks about. Now THAT is a computer worth replacing. Not some minutely faster CPUs that we don't need.
XPoint DIMMs seem already a revolutionary technology considering they are expecting 60% of DRAM bandwidth per channel.
Here it shows that XPoint DIMMs to be having 6GB/s bandwidth per DIMM, and DRAM to be 10GB/s bandwidth per DIMM:
http://www.kitguru.net/components/m...nt-ssds-will-feature-up-to-6gbs-of-bandwidth/
While the author misunderstands the XPoint 6GB/s bandwidth to be theoretical bandwidth, Intel's slide shows it's probably based on Stream. On Stream the 8 DDR4 2133 memory channels of the 2x Xeon E5 v3 achieves about 95GB/s, or about 12GB/s per channel. XPoint being half that is quite impressive, with dual socket Xeon E5 Skylake that would come out to be 72GB/s(6 channel/CPU x 2 x 6GB/s).
http://www.anandtech.com/show/8423/intel-xeon-e5-version-3-up-to-18-haswell-ep-cores-/11
Regards to latency the DDR4 2133 DIMM is at 80-90ns, which is very close to the ~100ns figure Intel quotes. And think of in that same slide in KitGuru article where XPoint is at 250ns. That's quite amazing. Consider how Skylake is at 80ns.