Blu-ray riddle

While adding items to wish-lists on Amazon for Christmas it became very apparent that many of the Triple-Play/DVD-Bluray options for more recent releases are only £4 more than the DVD only option.

Is it wrong to add Triple play versions to my wishlist despite not owning a Blu-ray player and with no clear plans to get one in the immediate future?

As it appears that Blu-ray only options are be coming scarce, it seems like an extra £4 is the cheapest option to future-proof a film collection.

Anyone else had this same dilemma?