Play just announced the upcoming Sony release, Terminator Salvation: The Ends Begin (T4) (UK) Blu-ray SteelBook™ and it's Play exclusive. These won't be available at any UK online vendors. However, it won't ship to USA.
Do you remember that Crouching Tiger, Hidden Dragon was once supposed to be exclusively for Play.com as the only steelbook listed on there site but it turns out that all store retailers and online vendors are selling those. For this reason, we're sure that other store might be selling Terminator 4 SteelBook. Time will tell.
Terminator Salvation or T4 for short, is a must have because some of us already owned T2 and T3 on Blu-ray Steelbook but we're missing T1. Hopefully it might add Terminator 1-4 in special packaging, just like the The Fast & Furious Quadrilogy, Transporter 3, and Underworld Trilogy.
If this turned out to be Play exclusive, then we must do a Group Buy respectively. There are lot of UK buyer/seller out there willing to help us get our hand on this. If you're interested, then contact me and I'll add your name on the list. Remember, Play.com had set the limit to 10 copies per order. So we can't guarantee to cover all that for the group buyers.