You can compare this product to the Nokia Communicator product line. Every 2-3 years Nokia has announced a new version of Communicator and the old version has been buried with it.

1996 – Nokia 9000 (GEOS 16-bit OS)
1998 – Nokia 9110 (GEOS)
2000 – Nokia 9210 (Symbian OS 6.0)
2002 - Nokia 9210i
2004 – Nokia 9500 (Symbian OS 7.0)
2005-2006 - Nokia 9300/9300i (Symbian OS 7.0)
2007 – Nokia E90 (Symbian OS 9.2)

Got the point?

And it's not always about implementing some features JUST because the target audience wants it. Example Nokia implemented GPS also to the newest Communicator E90. Well Communicator 9500 didn't have it. Nor did 9300/9300i. All of them are for business use.

Why would Nokia manufacture 2 almost similar products simultaneously, when they know that you would be as happy with N810 that you are with N800. It costs money and they don't want to spend it.

Of course Nokia will have support for N800 for along time, but you won't see brand new N800 devices in the future. Because they are not two different products.

I don't know why you cry about this? If there will be a new ITT device after 2-3 years, I'm sure it will have lot of new features like wimax etc. You can use your N800 till' that day.

And generally I think that lifetime for all consumer IT products incl. mobile phones is about 2-3y anyway.