That poses a dilemma expecting backwards compatibility on new releases. I suppose I should start complaining that Back in the US hasn't been released on Laser disc like Rupert, Put it There, Flaming Pie etc. or on Beta or VHS for that matter. Luckily I put in a DVD on my computer. I've never once watched a movie on it thinking it would be stupid to sit in front of a 17" monitor when I could watch a DVD movie on a regular TV set. I new sometime soon there would be actual computer data on a DVD. DVD roms are what $40 or $50 in the States probably cheaper I think there about $70 Canadian.
Maybe with the numbers that Back in the US has done to date will encourage MPL to release it on VHS at least. The secret website is a bonus. It would be technically possible for them to set up a voucher link, where you can register and login as normal on someone elses computer with your DVD and then they can email you a voucher key to get into the site, but though it is possible for them to do that, it would be taken advantage of and people would give the key away and before you know it, it's not exclusive any more.
I think the secret webstie is real cool, kinda of like buying the Wings Over America album where you got the extra posters in it. You didn't buy the album you don't get the posters.