I recently inquired about a replacement KEY from my dealer....mind you this is a KIA, not a Lamborgini, and they wanted $55.00 FOR THE KEY...and ANOTHER $25.00 to PROGRAM IT!!!!...THATS $80.00 BLODDY DOLLARS FOR A CAR KEY!!!!!. They 2 button remote is $75.00, plus $25.00 for programming.
So I asked, I found a place on the internet that will sell me my KIA key, and will cut it, all for about $15.00...so how much to program it...."that'll be $75.00 to program a non-KIA key, sir". And thats for a standard key, and a very basic fob, no lcd screen, just 2 buttons, one for the door, 1 for the trunk.
If the key is not programmed the car will not start, and the doors will not open, so all you have is a nice funny-shaped piece of metal with a cool rubber coating on one end if they dont code it.
So dont worry...manufacturers have you both coming and going.
So if my crappy $5000.00 KIA has such a sophisticated system..its all uphill from here.
That being said, I did see an ad for a "upscale" vehicle that did allow you to call it with your cell, punch in your secret code, and it wll let you in the door, and start the car. It may take a while for such a item to be included in low-end cars like mine.