This feature is great, if like me, you have a nostalgia trip every now and again with older games. Classics like Transport Tycoon, the MechWarrior Series and many others all work well on Windows 7 by using Compatibility Mode.
The other big advantage Windows 7 has over previous incarnations is that the system specifications were released to manufacturers well in advance. There is already plenty of hardware, and most importantly, drivers to go with them. The launch of Vista was marred by the lack of drivers for the first few weeks as hardware vendors struggled to get them completed in time. There is none of that this time round, thankfully.
Overall, Windows 7 will be good for running games. It works quicker, better, more intuitively and less intrusively than its predecessors. It is more much more stable and offers many more tweaking options than any of the previous versions.
Compatibility mode will enable you to enjoy any game that worked on older versions, and Games Explorer is a one-stop-shop for launching them. The availability of compatible hardware and drivers well in advance of launch is also pivotal in ensuring users can fully enjoy all Windows 7 has to offer straight out the box.