Just in time for the 1080Ti hopefully 

I don't get why Nvidia has a SLI bridge but AMD hasn't has a bridge in 3 years.
Anyone care to fill me in?

Faster PCIe sounds great for potential storage options. We got new DDR4, GDDR5x, HBM, and now pcie 4 coming up, its a good time for PCs.

WackyWRZ
I thought that much of the "issue" with PCIe was the lanes (or lack thereof) which was one of the selling points for the higher X99 cpus...  So does a faster PCIe transfer speed negate the need for more lanes?  i.e a GPU that's PCIe 3.0 running at x8 currently would only need x4 on 4.0 so you can use the other 4 lanes for a SSD or other storage?

I believe so. PCIe 3.0 x8 is the same as PCIe 2.0 x16 in terms of throughput AFAIK.

PCIe Express? Department of Redundancy Department.

Iterative built-in obsolescence. The story of discrete computer parts.

it would also make NVlink not necessary for desktop...because PCIe 4.0 will do
 

The PCI Express 4.0 socket is said to deliver at least 300W of power but according to reports, it was suggested that higher power options could be made available, meaning we could see up to 500W of power deliverable via the socket. Essentially, PCIe 4.0 could quite comfortably power something like a GTX 1080 without a power cable.
While these new sockets might mean less cables to GPUs themselves, it likely means we will need some additional power connections on the motherboards themselves, so you will still get some use out of your modular PCI cable set.
 
http://www.kitguru.net/components/graphic-cards/matthew-wilson/pci-express-4-0-due-next-year-could-kill-off-gpu-power-cables/ 
 
http://www.tomshardware.com/news/pcie-4.0-power-speed-express,32525.html 
 

When the pci-e will be out it will be time to finally upgrade the x58.

Even if Intel decide to improve performance of their processors they need to longer period between generations and bigger improvement only could arrive with second generation for 16-18 months. Nothing earlier.
But anyway people will be angry if Intel i7-6700K on Maximus VIII Extreme lose from AMD Zen.
I talk to people don't look 6 months in future, look 2 years, 4 cores is nice for now, but Intel ask huge price for 2C/4T and 4C/8T processors, 4 and 8MB L3 Cache, don't even to talk about almost 300$ worth i5 without HT Link.
i5-6600K + good mid class mobo Z170 + 16GB DDR4... 650$.
Now when AMD beat him with with 4/8 core CPU from mid class that would be interesting.
People give almost 1600-2000$ for i7-6900K and premium mobo and 32-64GB DDR4 Zen with 8C/16T could give easy same performance.
Such scenario become reality when people completely forgot on real improvements between generations 60-80%... etc...
Last 5 years reviews tried hard to present us 10-20% and reason for upgrade, with nice graphics, Lower Better-Higher Better but when you look total for 5 years we got same performance as for single generation.
Than if someone send on market real performance improvements people are shocked because they completely forgot what IT company can offer if they try hard.
Almost as Intel wait AMD and allowed to manufacturers sell 4-5 motherboard generation.
With Haswell was time to Intel launch 6 cores on mainstream and move Extreme on 8 and 10 cores, for 500 and 1000$.
But because they miss to done that now is late, they could increase frequency drop price on 300$ and only hope that AMD tests are not reality.