I agree with MOP.

We are getting BRAND NEW 737s and these things still have a lot of the same technology from the 50s/60s. These aircraft will be flying for at least 20+ years.
Even the new CS series requires pilots and it's one of the most advanced aircraft out there. A350? 2 pilots. 787? 2 pilots. That's as new and as advanced as commercial aircraft get.

Could they be converted? Possibly but at a massive expense.
Heck they can't even get rid of flight attendants who aren't even flying the plane. Once that happens and meals and drinks and safety and customer service issues are handled without FAs onboard then I will start to worry if I'm next.