After the recent rise in fares traveling on a preplanned holiday in 1st ac's in railways will not be a option for many especially if it is a rajdhani.
here are some fare comparisons of 1st ac rajdhani fare with ordinary airfare....
All fares are for 1st august
Delhi to Mumbai
1st...
more... ac fare Rs 4680 Airfare Rs 4011(spicejet)
Delhi to Kolkata
1st ac fare Rs 4775 Airfare Rs 4011(go air)
Delhi to Bangalore
1st ac fare Rs 6675 Airfare Rs 6341(spicejet)
Delhi to Hydrabad
1st ac fare Rs 5370 Airfare Rs 5848 (indigo)
Delhi to Chennai
1st ac fare Rs 6355 Airfare Rs 6341(spicejet) (31 st July)
..........and the list goes on
source: respective sites
hence I think that the recent fare revision will be too expensive for the railways.