There are limits, of course, even for apps like Goggles and Layar, which are two of the more promising entrants in this category.
In 2011, the Bill & Melinda Gates Foundation launched the Reinvent the Toilet Challenge, awarding $3.2m in grants to promising entrants.
If it can scale while also providing local appeal, it'll be a promising new entrant in the busy space of online dating.
Nunki is the latest entrant in a crowded market, promising to gather and sort breaking news, sports results and other stuff, drawing on social networks to ensure it's up-to-the-minute.
New entrants into the NHL look promising.
Two new entrants, Aldermore and Metro Bank, have popped up, promising plain "vanilla" deposits and loans without any toxic dabbling on the capital markets.
The savvy entrant could advertise a higher price of £5, while promising not just to match any lower price, but to refund twice the difference.
Prismatic is the latest entrant into the market, serving up news based on your interests, and promising to learn from your usage.
Several new entrants are expected soon, including subscription services from Apple and Google, promising additional subscriber fees and licensing revenue for the record companies.
The grand final, to be performed at Sadler's Wells and televised on BBC2 in May, is not the only focus, as the BBC are also promising to run a series of lead-up programmes, featuring behind-the-scenes documentaries and detailed analysis of the entrants and their different techniques.
