The whole app idea thing has been done countless times before, but what makes I Wish unique is that it appears to be backed by an app studio that says they'll choose one of our ideas to build each month. Time will tell if that's truly the case, but it can't hurt to submit your idea for the possibility.
I imagine this going to the next level: automatically filtering and raking ideas and then maybe crowdfunding them. Otherwise it's just a braindumped list of quick ideas.
What I'm missing here is two sections:
1) Exisitng apps / similar apps section - when commenting I would like to submit links to app store of stuff that is done or similiar (links could also be upvoted/downvoted)
2) tagging - too many dating ideas, would like to filter them out, would be lovely to have similar tagging system as StackOverflow