Here's the plan - let's get some of the biggest names in technology to invest in east London so that the area can become a rival to Silicon Valley. So will San Francisco, Palo Alto and Mountain View be shaking in their boots when they hear the prime ministerial vision outlined this morning to a gathering of hi-tech hopefuls?
Probably not - which is not to say that the idea won't be welcomed by the small technology firms currently clustered in an area around London's Old Street, known by some as Silicon Roundabout. The arrival of Californian giants like Facebook, Google, Intel and Cisco, which have all promised David Cameron either investment or advice for his east London tech hub, can only serve to add to the buzz.
Right now, east London has nothing more than a shoal of hopeful minnows, so a few giant fish will at least give the area more of a hi-tech identity. The government says that we are not bad at starting firms, but not so good at growing them into world-beating giants. The problem is that the likes of the music streaming service Last.fm, a Silicon Roundabout success story, get to a certain size and then sell up, often to an American giant.
The government hopes that the presence of the likes of Facebook, coupled with the collaboration of prestigious London universities like Imperial College, will help replicate the kind of environment that has made Silicon Valley such an engine of American growth.
What about any concrete measures to make it happen? There is some money - £200m in equity finance, though that is cash that has already been announced.
There is the "new" entrepreneur's visa, designed to lure individuals with bright business ideas to Britain - though this is just a modification of an existing scheme which the government says just hasn't been delivering enough entrepreneurs to these shores.
And there's a commitment to re-examine intellectual property laws for the internet age. Of course, that was done a few years back under the previous government's Gowers Review - but again, the coalition seems to think that wasn't fit for purpose.
What many entrepreneurs will say is vital for this dream to be realised is a change of culture to one where it is natural for young people with bright ideas to abandon their studies and start a business - as Mark Zuckerberg did to start Facebook, or Larry Page and Sergey Brin to make Google a world-beater.
From what I see of Britain's start-up scene, we are getting there, but it takes time. After all Silicon Valley did not take off for many decades after Bill Hewlett and Dave Packard founded their company in 1939.
And is east London really the prime site for the UK's tech champion? Some would say that Cambridge, already home to several billion-dollar technology companies, has a better claim, or the Thames Valley, where a host of major firms employing thousands of people are clustered along the M4.
Still, the start-up crowd, sipping cappuccinos in Shoreditch cafes, has just been given a wake-up call from the very highest levels of government. The test will be whether they can now go on to create the Googles, Facebooks and Ciscos of tomorrow.