In terms of vote share, it seems clear that Labour will be down on 2010 and the SNP will be substantially up. There have been two Westminster polls since the referendum result and both show a large Labour to SNP swing.
In 2010, Labour tallied 42% of the vote, the SNP 19.9%, the Lib Dems 18.9% and the Conservatives 16.7%. On the day after the referendum, Survation found Labour at 39%, the SNP at 35%, the Conservatives at 18% and the Lib Dems at 3%. Today, Panelbase found the SNP at 34%, Labour at 32%, the Conservatives at 18% and the Lib Dems at 5% (behind UKIP). The Survation poll represents a 9% swing to the SNP and the Panelbase poll represents a 12% swing to the SNP.
It remains to be seen whether this is a sympathy surge that will subside with time or a lasting level of support for the SNP. There have been nine opinion polls in Scotland canvassing the question of voting preference at a Westminster election in 2014, and the SNP have dropped below 30% with only two polls, both conducted by Opinium in September, so this seems to be a question of house approach rather than reflecting a sudden surge of support. Indeed, the Survation survey shows the SNP at a lower level of support than earlier in the year, when it twice registered 40%. So my starting presumption is that this level of support is pretty solid.