Do you mean a page to show all AskHN/ShowHN posts? Because it already shows all the posts (including AskHN/ShowHN) with more than 100 points.
Another way to think about it is i often want to see discussions and projects from HN folks. The frontpage can often just be full of popular nonsense - Reddit-esque. However ShowHN and AskHN often have gems that are obscure, with a much smaller amount of points.
Yet another way to look at it is: i'd love a toggle filter to only show me AskHN/ShowHN on the front page. However most days it would only be one or two posts.
Hopefully this illustrates my desires :)
(one final example, hah, might be this very post. I suspect it'll get over 100, but currently it's sitting at 60 pts)