Honestly, I think Google opened this up to all US advertisers on April 11th or the day before and just announced it today. Personally, I am a US advertiser and I still don't see the option, maybe something on my account is flagged as not liking TV. I do have clients that clearly have the TV ad option.
To entice advertisers to try TV ads, Google is offering a promotion that will cover the cost of producing a commercial - up to $2,000.
In any event, here is a screen shot of the start page:
Forum discussion at DigitalPoint Forums.