Let's re-examine, during those film days, why did people ask for SLR?
I think it's because compact film cameras' viewfinder is a separate unit, not really thru the lens. So, composition was not that accurate for serious photography.
If we look at digicam. Mostly has a 100% coverage! Not even your D70, D50, 350D etc can match! So, for composition wise, does it matter, or in fact, digicam is better!
Another reason for thre the lens optical viewfinder - for easier manual focusing. But wait....current breed of entry level DSLR has dinki viewfinder! Are they really easy to use in manual focusing mode?
On top of that, all newer DSLR have fast and multi auto focus point. So not many will rely and really need manual focusing especially casual shooters.
So, it's optical viewfinder really as important as yesteryears? Will an SLR like camera with huge 2.5" high res LCD live preview with interchangeable lens competes well with the current budget DSLRs? These budget DSLRs have small, dark and non-100% coverage viewfinder....hmmm