Surface is obsolete now. No reason for them to continue making new products. I'm surprised the Surface Laptop was actually made.
The whole reason they introduced the original Surface PCs, was because OEMs weren't making nice tablets and laptops.
Now, OEMs are the ones making better, more innovative products. I'd take HP's Spectre x360 over any Surface device. It has a better hinge, great screen, both future-proof and common ports, pen, it's thin and light, and IMO the design is nicer.
I couldn't say any of this about any PC before the original Surface.
I fully expect them to kill off the Surface Book and Laptop. I think they'll keep the tablet around for at least another year or two, but no new products unless they make something actually innovative. The obvious guess is the Surface mini/phone/tablet/hybrid device that everyone wants.