Not going to happen...
...whilst Parliament is full of people who think that the sun shines out of Bill Gates's rear end.
They're really going to run the Olympics on Vista?
We'll be the laughing stock of the world.
Still, it might just be the death knell of Windows in Government IT when it all goes, rather inevitably, wrong.
As to "linux people stepping up to the plate" - remember when the NHS IT contract was first mooted? Sun won the contract and were going to install linux across the entire NHS. A couple of phone calls later and the contract was reawarded to "Microsoft Gold Certified Partners" and we all know where that lead. Billions over budget and it never worked properly once.
Until Microsoft are acknowledged for the mafia like cowboy operation that they are, and are acknowledged as such in the corridors of power - nothing will change and tax payer's money will be p*ssed up the wall year after year after year.