I think MeeGo has very little chance (in smartphones) now that Android has spread virally. This was the case with the iPhone but they were strategic and turned the device into a fashion-accessory with a phone. Now that hardware technology has increased, the software is lagging in the iPhone. So along comes Android and saves the day.
For MeeGo to be as competitive it must really make itself very user friendly (Android/iPhone), show a lot of eye candy (squish them bosoms), represent high performance (it is light enough for underpowered devices yet powerful enough for netbooks), provide wide-cross compatibility (from cheap KIRF to netbooks) and allow alot of functionality (Linux desktop apps) as well as new ones (Multitouch, WiMax, Flash) to the smartphone market. MeeGo has the potential to be the "Windows XP or Windows7" for the rest of the electronics market.

I think if this is done exceptionally exquisitely and perfectly we could definitely be using only two OS's for daily uses:
The light and functional MeeGo for portables (ARM based Smartphone/tablet/netbook)
The heavy, powerful and full featured Windows7 for mainstream (x86 based laptops, desktop, home entertainment)