The ai scaling just adds sharpness but u can get the same affect adjusting ur tv settings,if u already have the older sheild then it's not worth upgrading to,but you could order one off amazon and if u don't like it you can jst send it bck for a refund
Apple dosent let u install any vpn on apple tv so u have to use a dns service instead ,like smartdns.com or getflix.com but there's others aswell,getflix is the cheapest at £4 a month and can be setup in 5mins and works better than a vpn,wish I had found it years ago