It's just a way to sell more product.
I'll be interested in seeing how these walkers perform in the grand scheme of things. Will they be easier to destroy (lighter armor?) than the ATs? To me, it felt like the Rebels first encountered the ATs on Hoth (even though they knew of them) since they had inadequate firepower to take them down and only realized using the tow cables would work if they could get close enough. The Rebels seemed unsure of how to defeat them.
My read on that was that the speeders couldn't take them down. I thought perhaps an X-wing or Y-wing could do it, but they needed the X-wings to escort the transports. Never saw a Y-wing on Hoth.