I'd imagine that upgrade to 3rd all-aluminium Jaguar AJ-V8, interior rehaul, cosmetic changes would add to the cost. '10 HSE competes with 09' supercharged, so LR RR marketing is most definitely going to extract consumers' cash. This is why the price will be higher - I could be wrong but no one knows the future.
I'm somewhat convinced that this price is good for the vehicle. Unless there is a good argument out there (very likely) that can refute this reasoning, I think this RRS SC is a deal.
The '09 RRS SC actual cost to LR cannot be less than 50k - this is close to 28% mark up on this brand. This is unlikely too, esp. since this brand mostly attracts luxury vehicle buyers and enthusiasts. LR sales (all models) in 07 was 108,000. Jeep (all models) sales in 2007 was approx 477000, a good 300k more. So Jeep probably has higher mark-up in their pricing than LR.
And (I agree) waiting is a virtue but this RRS SC looks so beautiful that I'm willing to take the risk in case the '10 comes out cheaper (due to crazy reduced component manufacturing costs!?)...