The vast majority of patents never amount to anything. It's indeed rare for a patent to be turned into a real product. SEGA have a list of patents over the past decade that didn't mean squat. Some loonies were looking at Nintendo's patents for a new 3D texture type thing and expecting amazing things from Wii. We all know how that turned out. And what about Sony's Visualiser powerhouse in the PS3?
Likelihood is SEGA have been watching how the market has been evolving and are getting in quick with the idea of an adaptable controller in the hopes they can get licensing fees off the players. This ties in with rumours of a Sony adaptable controller. Sadly for SEGA, Nintendo have already got an expandable controller. Luckily for SEGA, prior art counts for squat these days! Still, no new console. There's no rhyme nor reason to it. There's no market for it. There's no evidence for it, apart from the flimsiest circumstantial evidence and some very optimisitic 'tea-leaf reading'. The fact that the supporters of a new SEGA console are incapable of providing a solid market-based reasoning for their hopes just goes to prove it won't happen. First and foremost, if SEGA are going to enter the console space, there needs to be a justifiable economic argument that they will make lots of money. If you can't make that argument, there's no point at all looking at patents and trying to conclude they pertain to a new console. It's just a silly waste of time.