- Hardware - have offerings in multiple categories
- Software - have a way to deliver content in multiple categories (e.g. iTunes, Amazon.com, Google Music store, etc)
In the software platform scenario, the boost comes from capturing content sales in one category based on experience in a different category (very similar to HW). In this scenario, someone that has bought a song through iTunes on an iPhone and had a good experience with it is more likely to then buy a movie through iTunes to watch on their laptop, regardless of if it is an Apple laptop or not.
Although you should be able to realize benefits pursuing either strategy independently, there are positive interaction effects that favor building a HW and SW platform together, a la Apple (and to a less successful extent, Sony). If my theory from the last post that consumers go through the hierarchy from the ground up for each potential purchase holds, then having a HW platform, which again means offerings in the different categories built around a consistent brand, increases your chances of capturing a sale the next time around. Furthermore, if you have a SW platform that covers the 4 screens, it provides an additional reason for the consumer to purchase your product in the alternate category (because they are already familiar with the software, have a library of purchased items, are too lazy to switch over, etc). And I bet that every time a consumer chooses your company's products, their lifetime value increases as they get locked in to the platforms.
I did a quick scan of major consumer electronics companies to determine where they stand in terms of having a HW and/or SW platform, which is shown below in a 2-by-2 matrix, and there were 2 companies that stood out as having strong HW and SW platforms: Apple and Sony.

Figure. Platform reach across major consumer electronics companies
Apples competes across 3 of the 4 screens with HW offerings (I know they have Apple TV, but that's not technically a TV), and they have a SW platform that enables them to deliver content to all 4 screens (via Apple TV for TV).
Sony competes across 4 of the 4 screens, and I think they also have a way to deliver content to all 4 (or are working on it).
The fact that Apple is doing so much better than Sony implies that it is not necessarily easy to capture the benefits of the platforms. My guess is that this has to do with the coherence of the strategy. Sony still hasn't built a very uniform experience on their platforms, and they may have trouble doing so given that they are traditionally more HW focused.
Looking at the matrix, I imagine that Google and Microsoft, who have strong SW platforms, will continue to partner with companies that have strong HW platforms but lack the SW/content-delivery side of the equation (like Dell and Samsung). Amazon is a wild card right now, but I have a feeling that Bezos will try his best to move to the top right, where the highest potential profit lies. Finally, it isn't surprising that there are rumors of Apple working on a TV right now, since that would allow them to leverage the strength of iTunes on the screen that probably captures the most eyeball-time.
