For another viewpoint I'm running dev of a side project on an elementary laptop. Since bleeding edge of postgres and python doesn't matter much for me it is actually quite good. (relational database, no scaling problem for now and python packages are installed using virtualenv and pip. Sublime text also works nicely on two year old kernel )
Looking at it from the other side, if you have newer hardware Elementary OS may not work properly on your machine because it has an older kernel that may not have the drivers.
If the target audience is laptop users this is definitely going to be an issue.
For another viewpoint I'm running dev of a side project on an elementary laptop. Since bleeding edge of postgres and python doesn't matter much for me it is actually quite good. (relational database, no scaling problem for now and python packages are installed using virtualenv and pip. Sublime text also works nicely on two year old kernel )