eteherum will die some day, that is for sure but that day is not today, not yet anyways. because it is a bad coin with lots of bugs and bad history of manipulation ,... but this same manipulation is not yet over and there is a very high chance that it starts getting pumped real hard real soon.
But what will happen to Ethereum based projects? There are lots of big projects launched under the Ethereum banner so I guess it's hard to say imo.