Yet once the dancers begin to contribute their physical presence things can alter, and new problems emerge.

ECONOMIST: Dance

Stephen Hester, chief executive of the Royal Bank of Scotland (RBS), says there is a risk to "turn over rocks and find new things" that are still problems in the banking industry.

BBC: Stephen Hester: 'A risk of unturned rocks' at RBS

The S4 could do a lot of new things but early reports were that its AMOLED and chip production facilities were having problems.

FORBES: On S4 Day, Apple's Share Price Is Up, Samsung Is Down.

Every new technology brings with it problems along with benefits, and sometimes we cast aside some good things when we upgrade.

FORBES: What Lower Life Expectancy Tells Us About the Future