Except it wont be, how many dependant children are there from those who have fallen in recent conflicts, I doubt it will be a huge number (too many though), given that a many of those killed are young guys with no kids. Also given that any children of those killed in earlier conflicts may well have been through the school systyem by now and have already been to university if that was their intention.
Then consider that many armed forces personel, in particular the army, and this is not mean as an insult, are drawn from lower socio-economic backgrounds, where university or college attendance is less likely. If you also factor in the economic effects on a child of the loss of the wage earner in the family caused by the death of a father or mother in service, leading to the possibility of further deprevation and a further decrease in the likelyhood of university aspirations.
How about helping the families directly at a time when they need it most i.e. in the immediate aftermath of their loss and also through their time in school? Surely that would be a more sensible approach if the Tories are serious, but this stinks of being a grand gesture that is as empty as the government coffers.
However, it is would be good idea if it ever happened and I personally would welcome the security from knowing that if am unlucky to be killed in the service of my country, that my kids will not have to worry about funding their university studies.