Roku frequently comes across as the little media player company that could: its streaming box business is growing in spite of much larger competition. As healthy as it is, though, this upstart now appears eager to join the big leagues. Tipsters for both the Wall Street Journal and New York Times claim that Roku is planning to file an initial public stock offering (IPO) that could net as much as $150 million, roughly doubling what it raised through private investments. The details of just how and when this would happen are still murky, but the company said earlier this month that it's near turning a profit. It may wait until it's in the black and can put its best foot forward. If the IPO does happen, though, you should expect Roku to grow quickly. It's already striking deals with TV makers and has the support of major broadcasters -- the extra cash could both put more big-name services on your existing Roku box and improve the range of devices you can buy at the store.