According to a thread over at a Chinese Windows Phone community wpxap, one member claims that the next version of the platform, code named "Apollo", is currently being tested by an employee on a retail Lumia 800. Take this with a grain of salt before we continue, we're not entirely convinced ourselves as to whether or not this is actual reality, but it's best to be informed nonetheless. (In addition, supposed "insider" MS_Nerd Tweeted early this morning that the Lumia 610 was also testing Apollo).
Should what this poster has written be true, this would continue the debate on generation 1 / 1.5 Windows Phones being able to receive the "Apollo" update. What is noted are some noticeable improvements including speed / touch responsiveness, folders, an Internet Explorer overhaul and gravity sensing. Insiders believes the last feature to be tilt mechanics, with an example provided for enlarging image thumbnails by lifting the device closer to the users' eyes.
The inclusion of folders is an interesting addition to the list. What else is active on the acclaimed test version of "Apollo" is VPN support, which is reported to be disabled on the final build. As well as these features that have been published by an unconfirmed source, we expect the next major update of Windows Phone to introduce higher screen resolutions and dual-core support.
Of course, we're in "silly season" mode around here so like we said, put this on rumor shelf as there is no solid evidence for any of this so far.