To Tubbycricket:

"Maemo provides an open source development platform for Nokia Internet Tablets and other Linux-based devices."

The following is stating the obvious, but I think here it is worthwhile to be said: an UI platform - any UI platform - is intended to run on multiple devices.

That's of course the key idea of a platform: instead of having to build new SW for each new device, multiple different devices ("different products") can run the same SW. "It simply saves money." A company can bring out different products, serving some different needs, user groups and focus areas without having to create the software again. A platform is not tied to any particular product.

Or from another perspective: Simply think of the business interests of a company. The interest is there to keep the compatibility, if it can be kept. Nobody wants to shoot themselves in the foot, if it can be avoided. The consequences of these ideas should be easy to figure out. They are ... they should be obvious.