Each has struggled recently, Sony breaking up from the SonyEricsson partnership, Blackberry (ex RIM) with its failed tablet launch and delays to its BB10 OS platform, LG with the disastrous flirtation with Windows OS, and HTC.
Microsoft is touting a version of Windows 7 for use by tablet vendors, and the RIM device is supposed to use either the BlackBerryOS or one from a company it recently bought.