Cool site, except that Safari crashes instantly when I click on the link. (I looked at it in Firefox) So, other than it's still beta, it does provide a more detailed analysis than the guides here on MR.
The design and layout is pretty cool, don't think it's better than the guides on here though, the guides on here go into more detail about the actual products, and deal with older models, where as that just provides a "just updated" or "update possible" status' and really basic info
I wouldn't put any stock into that site. Case in point: both the Mac Pro and the MacBookPro are listed as "Update Plausible". We know that's not true. The MacBookPro's were just updated, and the Mac Pro should read "Update Long Overdue".