I think Enfors sums it up well.
The N73 and N93 would possibly hold the platform back as a whole due to their older computing hardware, which would mean they shouldn't get compatibility.
BUT the owners of those devices definitely deserve compensation if they aren't going to get N-Gage.
Nokia not only used the N73 and N93 in their promotional videos for N-Gage but also have had "N73 and N93 coming soon" notices on the official N-Gage site since the platform launched. Those coming soon notices are still there, the N73 and N93 are still on the official compatible devices page:
http://www.n-gage.com/ngi/ngage/web/g0/en/get_ngage/devices.html
and on the app download page:
http://www.n-gage.com/ngi/ngage/web/g0/en/get_ngage/download.html
Anyone who visits the N-Gage site is being told officially by Nokia that the N73 and N93 will be N-Gage compatible. Unless you follow the mobile phone world very closely, you would have no reason to doubt that N-Gage would come to these models. The N73 is still on sale so there may be people STILL buying these phones in the belief that they will get N-Gage eventually.
What Nokia should have done was removed all those "coming soon" notices the minute they realised that N-Gage might not come to those phones (which I'm guessing was in late 2007 as the platform was delayed time after time). Then they should have offered some kind of compensation for those who had bought an N73 or N93 for N-Gage, either on hardware or on games.
Therefore it would only be fair if Nokia compensated N93 owners with a rebate of, say, €50 or €100 on their purchase of a new N-gage compatible device as as been suggested above.
Yeah, I think that sounds about right.
Alternatively they could offer vouchers for ten free games, which would be of similar value (€70 to €100).
I think they knew N73's specsheet (RAM, processor, etc.) when they announced support for it in August 2007. I would hold the same things responsible in this case - lack of preparation before launching the platform and lack of communication between PR and technical staffs.
There was a massive delay in the platform's launch (originally it was meant to be September 2007, then Nov 2007, then Dec 2007, then Jan 2008... the actual launch was a beta test in Feb 2008 with the real thing in Apr 2008 and embedding in Sept 2008). They clearly ran into severe problems that they didn't anticipate when the original launch date was announced.
Perhaps this was caused by them running into unexpected problems getting the games to work on the N73 and N93?