One thing that's for sure: electrification of Springburn to Cumbernauld should be online by then.
A pity it is not continuing onwards to Edinburgh via the northern section of the Caledonian main line and Falkirk Grahamston. This would provide a handy alternative route to Falkirk High when that route is closed.
One thing is not clear yet in regards of electrification of the (what's it called?) Cumbernauld line. There is presently no Sunday service to Springburn via Glasgow Queen Street low level and Bellgrove (possibly with the exception of Sundays in December up to the one before the 25th), but there is one train per hour on Sundays that runs from Queen Street high level to Cumbernauld all year round. Would the Sunday service after electrification just be a Springburn - Cumbernauld shuttle using electric trains, a diesel service Queen Street high level to Cumbernauld as per the present case, or an electric service Cumbernauld to either Milngavie, Dalmuir, or Balloch Central?
Also if the Scottish Government and Transport Scotland are serious about getting people to use public transport to the east end of Glasgow from various parts of Scotland to the Games, Glasgow Crossrail needs to be up and running. The infrastructure is already in place (City Union Line from Bellgrove station to Shields Juction) and will cost very little in overhead line electrification and reopening Cumberland Street and Glasgow Cross stations, compared to the money that is being spent on London Crossrail.
In peace
Adam