New mobile devices OS promisses integration between multiple platforms

According to The Feature, Radixs will show its product on the DemoMobile 2003 conference in California. According the the company's website, the MXI Platform functions on a Single Operating Layer Architecture (SOLA), a technology beyond the multi-layer desktop computing architecture used in traditional mobile devices.

Once loaded onto your mobile device, the MXI Platform connected to the MXI Servers establishes a seamlessly integrated environment that can execute and multi-task full-featured applications, video and audio playback, complete web content and more.

At the heart of the MXI Platform is a powerful engine. This engine manages all user requests and activities, and provides all of MXI’s wide-ranging capabilities.

The MXI Platform offers distinctively unique benefits to users:

Launches operator-hosted applications from the MXI Servers without needing to download or install locally

Executes Palm OS, J2ME, built-in and downloadable applications locally

Plays all multimedia formats supported by the MXI Servers without the need to install new plug-ins

Fully customised skins with sound FX themes

Because their website is quite obscure in terms of technical details and information, and without going into further details, I can only think this is a client-server model, where the MXI platform will be a client hosted on a Palm OS or J2ME mobile device (a smartphone by this description), with a server that will answer requests that can not be processed locally.

Doing a Google Search I've found more references to this platform. One of the source cites "...company officials showed how a laptop computer running on the MXI and acting as a server, streamed office, communications and entertainment apps instantaneously onto the “client”, an iPaq PDA. The MXI has two parts: one is the client OS, and the other part is the server OS..."

Why does it sound like a walled garden description to me? Why companies insist in calling this stuff "OS" when the OS is actually a layer below (the Pocket PC or Palm OS)?