GPS is there to help once you have mastered Ded Reckoning.
Its a back up system just like VOR's and NDBs (remember, NDB is 70 year old technology that's still an integral part of training!)
GPS is obviously here to stay and in 5 years time it will no doubt be commonplace in all GA aircraft. As with all technology, prices will drop to about £100 per unit (just like cameras, Hi-Fi and DVD players which were once £500 and now you get them free with a tank of petrol.)
Its there to help so use it. If airspace had not become so restrictive in the last 40 years and punishments for entering it so punitive, then surely GPS would still be a figment of imagination in some mad-scientists mind?