Er, any system that requires customers to have a particular brand of smartphone, with NFC capability, is never going to happen. Even if it were an option, basing security on this would mean that the 75% of their customers without the required model of smartphone would then be more likely to have their room broken into. Hotels may be kind of clueless, but they're not stupid enough to reject or screw over 75% of their potential customers...

[This is why the frequent suggestions you hear "oh, why can't we replace <system X> with a smartphone app!" are so stupid. Optional smartphone support for convenience features = nice plus; mandatory smartphone = idiotic.]