Although the discussion of RFID chips and RFID readers at tables is interesting from a technical perspective and something that should continue to be explored, it's probably not feasible yet.
Reading every chip throughout all transactions during a tournament would be expensive, complicated and prone to error. Might as well just get rid of chips completely.
A better short term solution might be to use RFID chips to supplement/verify human chip counts at end of day and table changes as well as counting all chips in play. It would also help identify counterfeit chips. RFID tags aren't that expensive. The biggest expense would be the chips themselves.
Additionally access points to the tournament area can have exit scanners like most retailers do to minimize chips leaving and entering the tournament area. Bags would have to be prohibited. Maybe coats checked if something seems bulky. Women with large breasts would have to pass through topless. No. Not really. But how awesome would that be?
Well, if you're not a woman that is.
People would still be able to smuggle out chips but not in large quantities and casinos can be made aware of how many and which chips are missing.
It's not foolproof but it minimizes some risk at a reasonable cost. Dealer, floor and even players would also need to be vigilant and able to report suspicious activity.