This slide indicates that Glacier Falls will be available in the third quarter of 2019. This means that Skylake Refresh will have rather a short lifespan of three quarters.
The picture also lists B365 and H310C chipsets. Both start to appear on the market with under a new motherboard SKUs.
Interestingly, there's also a picture of a slide that shows some new 8th Gen Core and 9th Gen Core CPUs. The Core i9-9900KF, Core i7-9700KF, Core i5-9600KF, i3-9350KF, and the i5-9400F and i3-8100F. No word on what these parts entail.