The other day I was looking at Stack Overflow on my Android phone. All is made very nice and all, but I could not find the Review button/link. Is it being implemented, did I miss it, or it is not available?
IMO, this is a pretty good idea, and I don't see why it would be a low priority. Also, I'm sure it could also be implemented in the mobile apps. And hopefully it might take less than 6 to 8 years to implement. Of course, it would require a team of skilled software developers, but the word on the street these days is that this is something SE is in possession of.
Some sites (like Ask Ubuntu, for example) have lots of work pending in the review queue, due to a continuous influx of new users (among other things).
If the review queue was more inviting on mobile devices, users may feel inclined to do it as a way to pass the time while commuting to work, waiting for something, etc.
You know how some people sit on the bus browsing their Facebook feeds, etc? Often, it's because they are bored, and want something to stimulate their minds. Out of all the millions of SE users, I'm sure many do this. In this way, much of this energy can be turned into something useful.
Encouraging people to help out more, in this way, would probably benefit sites like that (and, of course, the whole network) by bringing more eyes and hands to the review queue. This will certainly improve the overall quality and tidiness of the whole network. Close-worthy questions will be closed faster, improved ones will be reopened faster, spam will be deleted sooner, poorly written posts will be improved sooner (or at all), etc, etc.
I sometimes do this on my phone using the desktop version of the site. But a mobile optimized interface would certainly be more inviting, appealing and encouraging to users.