"No receiver or really any electronic component (other than a separate amp) is future proof. New formats and features are added every year and internal components improve as well - not to mention that the price constantly drops.Speakers though can last for decades."
I second that!
In 2 years, Dolby may come out with something like Dolby Super Dupper TruHD, DTS may come out with DTS-HD Super Master Audio, and Sony may finally release SDDS (Sony Dynamic Digital Sound)
Then someone else will come out with BTDTSDS --- that stands for Better Than DTS & Dolby & Sony!