I am not sure if assuming 7% net profits is accurate, in that business there is a fixed cost of about $500 MM per year (look at XMSR for instance), then there are "gross margins", these should increase as the number of units in the field increases (in essence the units sold are a loss leader), XMSR gross margins are currently at 20% but these could easily increase to 33% (lets be generous). Thus the break even point (under these assumptions) would be yearly revenues of $1.5 B, or assuming revenues of $150/subscriber, we will get a breakeven at 10 MM subscribers. Every subscriber above that level should bring to the bottom line $50 pretax, and maybe $30 after tax. To get your 1.2 B earnings would thus require an additional 40 MM subscribers or a total of 50 MM subscribers. Even if we assume that SIRI will share with XMSR the market evenly, that means a market of 100 MM subscribers. That is close to a 100% penetration of all households (I think that if a family gets systems for multiple cars they get a deep discount on the second unit?). The cable industry took 30 years to achieve that kind of penetration.
The question is , if you want to ride this wave and have faith in the concept, which stock would you rather ride, XMSR or SIRI, they both have market cap in the $6 to $7 B except that XMSR has about three times more subscribers already. Personally, I would rather bet that NVEC indeed succeeds in getting a major handle on MRAM and that MRAM would indeed become bigger than DRAM and flash combined, than bet on radio satellite reaching 100 MM subscribers in 10 years.