No, if the product is marked 'Showroom', it is simply that it is on display in certain branches. This is not the case for all products. But if you buy an item, you are buying a new product and not the one on display.
Hello,
The Galaxy Tab A7 does not have an MHL interface, so you cannot connect it with a corresponding adapter. However, it does support the "Smart View" function. This is based on the Miracast standard. If your projector supports this, you should be able to transfer the image wirelessly to it.
Unfortunately, we do not have any information on this at the moment. Should the product become available to us through our suppliers, we can check a possible inclusion.