Tech Tent 35: Watch and learn

The rumours have been swirling for a while, but finally tech giant Apple unveiled a smartwatch. What impact will this have on the already bustling wearable technology market? Will it be a game changer and can Apple repeat the success of previous devices - or is this one piece of technology that consumers might feel they don't really need?

Can you sleep be improved by a sensor? Entrepreneur James Proud certainly thinks so. He persuaded members of the public to pledge over $2 million to fund his product. He tells us how it all started and what his plans for the future are.

It's the most expensive video game ever made with a budget of $500m. Destiny launched this week and we'll be finding out whether all the investment was worth it and whether video games really are the new blockbusters.

Joining Rory Cellan-Jones in the tent are Jane Wakefield and Dave Lee from the BBC's online technology desk with special guest Jemima Kiss, head of technology at The Guardian