Who is Milo Icon and what are the 30 projects that is going to move to ETC? Who are backing these projects? If they are small projects started in a "garage", I foresee this trend will happen more in the future. ETC will become a "community" platform very much like NXT and all the projects will come from the community. ETH will be a corporate chain and most of the venture capitalist funded projects will choose to be created and developed in the forked chain. This will be good because there will be less competition from the both of them.
Large corporations will only use private chains where there is no public access and as such have no use for ETH at all. You will see a few startups spun off (marketed) as being major advances in ETH space publicized to support the continuing pump.