Adding @tanner0101 who is also interested in this topic I think.
As Cory says, I personally also think that this is a good long-term goal. At the current stage however I think we should use our energy on areas where there's a more immediate need, for example the areas laid out as the focus areas for the SSWG. Why? IMHO Swift on Server is in a good shape regarding web servers already but in other areas we're still lacking in other areas.
Needless to say I don't to stop anybody to work on something like WSGI, nor do I know what will is actually the most important thing when we look back in two years time or so. Therefore please take this as my personal opinion and no more 
.