By the way, what I really like about the combo of conventional fighter + cruise missile and UCAV is that it gives the defender three things to worry about: jamming, extreme low observables and extreme low altitude. Rather like the Aurora/Quartz combo but on a different scale.
The UCAV addresses the time-of-flight issue: Look at Neuron's sensors and planned test program and you can see where it's headed.
And before anyone complains about the cost of three systems: CMs have ICBM economics. You buy them and keep them in a bunker, fire one per year to see that it works and to validate S/W loads. UCAVs likewise fly minimally - put an appropriate pod on a Hawk for exercises.