"...if you want to have larger digital images than a 7-7hi can give you, please make the images on 24x36m film and scan these images in the size you want to have them..."
I think there is more difference than just the size of the final pictures. For what I have experienced so far, My Velvia and Provia images scanned with a Nikon Supercoolscan 4000a and printed out on an Epson Stylus Photo 1290 exceeded by far any print from a digital camera I have seen so far.
Both, in A4 and A3 the colours, contrast, sharpness and exposure range was better with the scanned slide.
For my (personal) purposes, Digital cameras can not replace yet my analog camera - but this everybody has to decide for himself. But I would be happy, if that would be possible also for me in 2-3 years.