This should in theory allow application developers to reuse chunks of code on PCs and smartphones, potentially killing the current application drought affecting the windows phone platform.
Tighter desktop integration will also see the Zune PC client (which is used for transferring content to the phone and syncing it) being dropped.
Windows 8 and Windows Phone 8 will both also be able to use SkyDrive support to seamlessly share data, so accessing music collections on the move will be possible, as will editing notes and documents created on a PC that were typed on the fly from a user's smartphone. Provided you can stomach the mobile data costs, of course.
Whilst mobile data consumption is doubtlessly going to increase with Windows Phone 8, making calls should become more affordable thanks to greater Skype integration. This should see making a Skype being almost the same experience as making a normal mobile call - although Microsoft is yet to be clear on what its plans for the internet telephony software are for the future.
Another potentially compelling feature is what Microsoft calls Data Smart. DataSmart should give Windows Phone 8 users a lot more control and visibility over how their smartphone uses mobile data. Not only will DataSmart incorporate a live tile to provide an at-a-glance view of mobile data consumption, it will also prioritise Wi-Fi connections and automatically connect to any telco-owned WLANs in range.
Whilst this could dramatically reduce the ongoing costs associated with using mobile data, being locked into a telcos Wi-Fi network could also be a costly undertaking.
Microsoft has also tweaked Internet Explorer 10, which gets mobile friendly thanks to the addition of server-side compression to greatly reduce data consumed when surfing the web.
On the security side of things business users will get 128k native BitLocker encryption to keep data secure, and the video also talked up "line-of business" apps that should let businesses run their own proprietary apps from behind company firewalls.
Last but by no means least, Windows Phone 8 will also include support for MicroSD (about time, thanks Microsoft), four new screen resolutions and NFC (which could transform your phone into a digital wallet for low value contactless purchases).
With the Nokia Lumina range about to launch, the fledgling Windows 8 operating system platform will no doubt be garnering significant media attention in the near future.
Assuming the features detailed in the leaked video do come to market, Microsoft may soon be in a position to give Android and iOS a real run for its money - although a big questions is whether or not the Seattle software giant has left its run too late. As competition in the smartphone market intensifies, the real winner will, hopefully, be the consumer. Here's hoping.