If this will be implemented, I think this will help a lot when it comes to speed since Fiber is a two way communication and much lower attenuation and interference compared to what we are using right now.
but we need also to keep in mind that this is DSL, it means Shared-Bandwidth.
The more people who are using same ISP on the same location signal will really deteriorate, specially those houses who are far from the ISP's Exchange box.
imho