http/en.wikipedia.org/wiki/Android_(operating_system)#Restrictions_and_issues
The Android platform does not support animated .gif files at this time. It only shows the first frame.
Android uses Linux as its kernel,[79] but according to Google, it is not a conventional Linux distribution; it does not have a native X Window System, nor does it support the full set of standard GNU libraries like its system libraries (GNU C Library). This specific modification makes it difficult to reuse existing Linux applications or libraries on Android.[80]
Android does not use established Java standards, i.e. Java SE and ME. This prevents compatibility among Java applications written for those platforms and those for the Android platform. Android only reuses the Java language syntax, but does not provide the full-class libraries and APIs bundled with Java SE or ME.[81]
Because of potential security issues,[82] Android does not officially allow apps to be installed on, nor run from, an SD card. Current Android products such as the HTC Dream and Magic have limited onboard memory and many users feel restricted by this lack of functionality.[83] However, several unsupported modifications exist, to give the user this capability.[84]
ARM Holdings and RealNetworks have expressed doubt that it will gain a major market share as a netbook OS.[85]
Responsiveness can be poor due to the limitations of Dalvik's automatic memory management.[86]
Developers reported that it's difficult to maintain applications working on different versions of Android, because of various compatibility issues between versions 1.5 and 1.6. This however was only true in some rare cases, specifically during the ADC2 contest.[87].
I believe office2010's coming in 2H-2010 will cause a milestone WinMo release. this will bring the real push for WinMo6.5.1 or WinMo7. MS is releaved from Windows7 side and all energies are now concentrated on Office/Sharepoint-2010 and WinMo. I can also think of this because Office2010 will be super compatible version with Cloud and GoogleWebApp Killer. this all jargon canot be convincing unless MS shows this on ground and no other better way than to show Web/Cloud on Mobile devices. Hence Office/Sharepoint-2010's survival is attached to future of strong WinMo/