I think studios should start with re-releasing all the stuff that was on laserdisc that never was available on VHS. There are some great laserdisc-only box sets that are now very hard to find like the Vitaphone and MGM short collections, Dawn of Sound, and the Jolson and Garbo collections.
I heard the Jazz Singer (the original) is still scheduled to be released on DVD, but no date is known. The same is true with Gold Diggers of 1933. Both will include bonus clips - Singer will have Jolson's first long-lost Vitaphone short, and Diggers will have recently restored previously lost footage