No channel is in crisis. This is not 1980 any more with only 3-5 channels this is 2013 with more then 40 channels. BBC 1 and ITV still get very good ratings with 5m nearly every night. Channel 4 still gets good ratings for their documentrys same as channel 5.
i think some posters expect 20m to still tune in but thats never going to happen again
Yes, the UK has moved on. Digital switchover has given everyone multi-channels, so more choice (good or bad) and many people now spend as much time on the internet as watching TV.