I've had my N900 for almost 2 weeks now, and I love it, though haven't used it as much as I've wanted to. In addition to what was written above WRT apps (especially games), you should know a few things:

1. Being mostly open, the N900 generally far expandable in what you can do versus Android and Apple. No jailbreaking is required! In addition, as you have direct control of the device's Flash storage, you can re-partition it however you want, so you can add swap, more program storage, etc. A combined 48 GB is supported between the internal 32 GB and a 16 GB uSD card; a 32 GB uSD card has been developed by Samsung, but I have no idea if the N900's hardware uSD interface can handle it.

2. Easy Debian is available for other platforms, but it REALLY shines on the N900 because of the above. Easy Debian gives you a full-blown Linux distribution running semi-virtualized underneath Maemo: if it will run under ARM, it will run here. Using Easy Debian, people have got wireless printing running, Open Office, the GIMP (open Photoshop clone), and even--recently--Wine, the Windows-not-emulator, which should dramatically help with gaming needs on things that don't eat a lot of processor time (because x86 needs to be translated/emulated to ARM).

3. The N900, even if discontinued, has a future because even if Nokia decides they won't make a native MeeGo for it, the community WILL! Also, you're not limited to some app store thanks to Easy Debian as well as the always (yes, even now!) growing list of native Maemo apps. I believe that the compilers are even working natively under Maemo now (i.e., not under Easy Debian) so you can work on your own app on the device without using an emulator on some other machine.

I bought the N900 because of reason #3. I have no idea if Nokia or anyone else will *EVER* release a device as open as this one again--only the OpenMoko Freerunner was more open, though less capable hardware-wise--so I jumped on it when I saw it was apparently discontinued. It's not quite the netbook/laptop replacement I'd hoped (yet) due to tiny screen (800x480 sized down like that make for *TINY* pixels!) and lack of USB host mode (which has almost been conquered by a very dedicated team), but it's very close and you won't find anything else remotely like it once you see just how much you can actually do with it...provided you're a computer power-user, of course, and not just an appliance operator that just clicks icons. (This is the reason, IMHO, this device really isn't meant for the masses: this is for us, the geeks!)

Hope this helps,

Mike