What he says (below). The jet, reasonably tricked out, is more like 2.5X the price of an SR22, plus brutal operating costs and very difficult type certification. I just don't see the numbers there to have a major impact on SR22 used market.
G1- G3 SR22's remain a great value, especially G2's. For $200K or so, you can get an SR22 with a fresh parachute. For the price of a mediocre 182, you get a plane that has faster speeds, avionics that do just about everything (with great redundancy), great fuel economy, and...most important (for me anyway)...a parachute.
Insurance rates have come down a bit, due to Cirrus' remarkable recent safety record. (Cirrus got AOPA's safety award this year).
Also, keep in mind, not all those "positions" by SR22 owners will result in sales. Many are actually marketing their "place in line" now.
Unless you have money to burn, focus on earlier Cirrus models. And if you go for the jet, I live in So Cal and will happily share expenses during a flight any day, any time, 24 x 7!
Some don't but many do. From what I understand the majority of deposit holders are current piston SR22 owners. Not that hard to stretch to $1.5-2M for a lot of folks who paid $900K for a new G5 SR22T. Moving customers up your product line is a well established approach for all the vehicle (car, boat, airplane, etc..) manufacturers.
But to get back to the OP's question, I would expect to see a little bit of price pressure on 1-3 year old SR22 G5Ts because that is mostly what position holders will be getting out of and they've been staying pretty high lately, but the SF50 sales will be at a much more measured pace than the 300+ SR2X that Cirrus is selling per year so I don't expect a huge impact and none to virtually none on the earlier G1, G2 or probably even G3 airframes.