I think Rossy's right.
SNP should focus on governing decent in Scotland, sit in and be constructive with the crubs from Smith, whilst fighting the GE for more devolution (devo max if you wish).
Basically heid doon and power on. It's a pretty exciting time and those polls are spectacular, but we all know it'll be very very tight in May and Labour have some massive majorities to be over-turned.
Put a new referendum on the back burner for now, but circumstances change dramatically, and there is no such thing as a settled will of any nation - so we could well have one in the future if something dramatic like Britain leaving the EU happens, further strained relations between the regions etc.