The future is PC. Bear with me......
Microsoft is already heading their Xbox ideal towards computers. Their vision has always been a living-room game-focused computer. With Windows 10 they are bridging the gap. SteamMachines are a first step the other way around: computers coming close to consoles.
Well, arcades these days are simply very gaming optimized PCs. Sega is pretty fucking good at this, they may as well be the best at making arcade machines right now.
Past Sega consoles based themselves in Arcade architecture (System16, Model2, NAOMI). What this is hinting at is a future with gaming-focused livingroom Sega PCs. Sega exclusives developed for these machines released at the same time for PC.
Completely shifting away from regular console development could be an intelligent move if the PC offer is good enough. They could focus development on this one platform. The games would run on a normal PC anyway, and PC games could run on the Sega machine through Steam or whatnot. But we could have dedicated Sega hardware (machine, controllers) and online infrastructure (a new age Dreamarena of sorts, think Live meets Steam).
It would be pretty nifty. Valve is pretty much doing this already, but it could be perfected.
Why would this happen though? Fresh leadership.
Something very similar just happened at Toyota recently. Toyota cars had been shallow, safe, grandad vehicles for years when the company decided to give Tetsuya Tada a chance to lead his own project.
What did he make? A fucking sports car, the GT86. A pretty good one at that, the first one in over a decade from Toyota.
The reason was a simply "wouldn't it be cool to make a sports car?"
Sega has new leadership, a young man with fresh ideas that in matter of weeks changed the company's whole philosophy (for the better!). It's not hard to imagine someone that has the love for the craft to simply start a board meeting with "wouldn't it be cool to have our own hardware again?"
I think it would be pretty cool. Although it's a very far out dream, it's not as impossible as it seems: dedicated Sega hardware, a departure from traditional consoles, a step into the true future of gaming-focused PCs