Having played with a 5800 for a bit over at the Nokia store here in Manhattan, I can agree that it is currently the premiere touch screen device for Nokia. The resources dedicated to bringing it to where it is are probably orders of magnitude higher than the resources dedicated to the maemo devices. The flagship N97 looks like its receiving an amazing amount of R and D work, I heard a rumour that they are releasing new firmware every few days for the prototype devices and that the hardware is still going through tweaking with still more revisions before its june/july launch.

I hope that with the graduation of Maemo into a seemingly higher profile place in the Nokia ecosystem the tablets can take steps in the direction of the more polished experience you get from S60 as well as retain their unique mini-laptop capabilities.