What do you define as hope? XBone shipments for all of 2014 are going to be right around 6M units total, worldwide. That includes a bunch of likely-well-stocked-yet-lackluster launches in TIer 2+. The XBone sales you see in the US and UK represent almost the entirety of their overall sales. Other countries aren't buying it. Honest.
But let's assume it is selling just as well in countries that don't speak English, and rather than having stock gathering dust worldwide, those launch shipments are being replenished regularly. So that's ~6M shipments in 2014 for MS, compared to ~15M shipments for Sony in the same period.
So let's look to 2015. We know MS will have some exclusives for the holiday, and we know Sony will have exclusives all year long. MS are already back to $400, where they were being outsold by Sony nearly 2:1, even in the US. This holiday, MS were able to pull ahead of Sony in the US and UK by drastically undercutting Sony on price/freebies. Meanwhile, Sony mostly stood pat on their value proposition and handily outsold MS worldwide, even counting the slight loss they took in the English-speaking countries.
But, by next holiday, PS4 will almost assuredly be at $299, so where do MS go to buy sales at that point? $199 with two games? For Black Friday 2014, XBone bundles were literally going toe-to-toe with PS3 bundles on price. So seriously, what's the plan for 2015?
Sony shipped 15M in 2014, and with a legitimate price cut 2015, they can include a steamy turd in the box and do the same again. 20M units in 2015 with a price cut is easily possible; it's only 33% more than they shipped at $399. They could maybe even do a bit more than 20M if the $500 bundle with Morpheus takes off.
So another 15M-20M for Sony this year, and realistically what, 5M for XBone? That'd be 3M US, 1M UK, and 1M Elsewhere. That's only a little off their 2014 shipments; I think they'd have to be pretty happy with that, especially in the face of a significant price cut on the PS4. So maybe 37M:14M by the end of 2015, 55M:18M for 2016, 75M:20M for the end of 2017
So probably something like the PS2 generation. Like PS2, PS4 could hit ~100M in five years, and continue to sell for a while after the PS5 launches. By the time the PS5 launches, the XBone will likely be a bit over 20M with the majority of those sales coming in the US and UK, much like sales of the XBox.
So with sales like that, I think XBone users can always "hope" for a port of Madden, and probably stuff like CoD too. Basically, about the same level of support the original XBox got. Were you hoping for more? It seems pretty unlikely that Ono will be the last developer to realize they're better off without Microsoft.
Also, MS could actually pull the plug on the entire project before it even runs five years. Again, that's what happened to the original XBox when they decided it was going nowhere. Earlier in the thread, some people were talking about MS likely wanting to "exit the market gracefully" or some fanciful shit like that, but that's not the MS I know. Look at the Zune; when MS decide they're done, zero fucks are given.