There is a difference between offer and invitation to treat. Advertisement is an example of invitation to treat. According to the case Partridge v Crittenden [1968] 1 WLR 1204, Partridge advertised rare wild birds for sale it is an invitation to treat. The situation is similar to the above fact. Hence, there is not an offer made by Tony. The case, Grainger and Sons v Gough [1896] AC 235, can also be used to distingue offer and invitation to treat.
Besides that, shop displays is also an invitation to treat but not an offer. As can be seen in the case Pharmaceutical Society of Great Britain v Boots Cash Chemists (southern) Ltd [1953] 1 QB 401, the customers took goods which displayed in shops is similar to Emma saw the big television in the shop. Thus, there is no offer made by Tony, the television in shop displays is just an invitation to