Is UBUNTU going to replace Windows

After I got a note telling me 2 install UBUNTU I ignored it Just some other crap ?

but what the heck lets give it a try
Installed it with Xp running
Surprise No drivers needed to be installed every ting worked fine
3 printers working no install needed
Screen working no install needed
Sound working no install needed
Funny No problems so far
Its working without a glitch must be something wrong with it ??
Yes MS Office isn't working but the substitute Open Office Running with out a glitch
Mail easy to configure and working
Well internet ?? Fire fox works no Configuring ??
The only errors I found ware
1. No CD keys needed.
2. No Office keys needed 'something's wrong here'
3. Totally Nothing other than mail needed to be configured
4. Cost Nothing.
That's surely wrong ??