I think cord cutting will only increase...
... when more folks actually have a choice of ISPs/MSOs that can actually compete with each other in all areas of service. Here, Comcast does it all... on the other hand, CenturyLink only has phone and internet (in these parts), the TV services are bundled with DirecTV. To top it all off, anything data intensive (i.e. video) is a no-no as speeds top off at 1.5Mbps at my place (it was 3.0 a few months ago...?)
You must not be getting an actual speed of 1.5 megs. I just bought a blu-ray DVD player and my DSL runs around 1.5 megs and i have no problem streaming netflix content as long as i dont have 5 or 6 computers trying to do the same on the network. I you have a household of kids using the network then that's another matter.