http://gamasutra.com/blogs/MattMatthews/20140301/212050/
Not too bad at all, already over PS3 in revenue (BTW, in UNITS PS4/One lag more, but the average selling price of next gen software is high, so they are not far behind).
I think a substantial (more than 30 pounds) cut and they'd be fine in UK. This really shows me why they did that in UK, they are not far out of reach.
If Xbox can stay strong in USA and UK they will be safe. Just those two countries led to 360 outselling (or tying if you must, to avoid controversy) PS3 worldwide last gen. Xbox obviously cant think about outselling PS4 yet, but they will at least maintain third party support with a decent showing in US/UK for now.