If the bridge was built, Camas would look a lot more like Orchards. The Camas-Washougal area is already sprawling out too, so accelerating it would be disastrous.
I mean, sure, there would be some growth. But Washington has Urban Growth Boundaries as well, so it would be somewhat tempered. But I think a NE-SW alignment would discourage people who are trying to commute into Portland proper, so commuters would primarily use it if they were going to Troutdale, Gresham, the Airport Way corridor, etc. I just think it's a limited market for local use, but a stronger market for regional freight traffic.