Don't know if anyone else has seen tonight's gadget show broadcast in the UK where an incar computer was tested. XP based with voice recognition it featured satnav, Office 2007, DVD video and music playback, VOIP and phone control. It was also able to connect to the tinternet via wifi and 3G.
Here's a link with photos http://gadgetshow.five.tv/jsp/5gsmain.jsp?lnk=401&section=Features&show=s9e2&fea tureid=813&description=In%20Car%20PC

However with the exception of voice recognition, and native Office 2007, I was hard pressed to see where it scored over a tablet.

For video and music we have Canola2 v(others are available). Satnav we have wayfinder (steady, I quite like it anyway)and Maemo mapper. We have Voip, and phonelink for the phone control, if you don't have a nokia smartphone(! for which nokia should port some of the labs apps).

The featured 'puter also had 160GB of storage which beats the 32Gb on my N800, but I could connect via USB to an external HD of my choice.

The article showed Jason phoning his local coffee shop to get the guy to bring him a coffee, checking his google mail, opening an attachment in Word 2007, and then composing a reply using speech recognition, that bit was very cool I must add. He also ordered a pizza, and navigated to the local supermarket.

virtually all of which I could do with my N800, bluetooth keyboard and GPS, and my kit goes in my pocket!