Depends. In our suburb, people want older Queenslanders. There are parts of the suburb that are 1970's brick and those streets never held the values of the streets of Queenslanders. I suspect that as "modern" is in, that may change or already have changed as people change the 1970's look with "modern" facades.
In fact, after living in old houses all my married life, and in fact renovating our 1950's house backwards to look like a 1930's house, if I had my time again, I'd take it forward.
So, I'd say a modern brick house in among Queenslanders (for example) will not have the same value, but it would depend very much on the suburb.
I find the changes in our streets quite interesting to watch, but it probably has as much to do with my changing tasts as well.
Wylie.