I don't think you should take away - or subsitute new technologies from (your) children.
It's just the way life goes. Things change. I am happy my parents didn't force my brothers and I to create our own games with clay, as they did in their childhood.
We got lego, k'nex, sega and all these other fancy (at that time) things. And these were not cheap at all!! Prices comparable to Ipods and Nintendo's nowadays.
And about the registry card... hmm well I don't know. I don't think it's correct, but if people are going to buy him stuff, at least he'll get what he wants.