My worry for the future can be summed up in a few points:
1. Main concern: I buy a game and play it online. I chose not to buy the sequels (or expansions) but Publisher dumps me off their Networks for not having the "Latest" version. Upgrade or die. I don't expect to play
Generic Shoot-Em-Up X online for 20 years, but I should be able to play it for more than six months before the Publisher "decides" to end it for me, simply because they have a newer version they want to sell.
2. Secondary Concern: All Your Base Are Belong To Publisher. Publishers can't agree on anything, and are often run as Fiefdoms. I can't see Valve ever using Battlenet, neither will Microsoft ever use anyone other than themselves. So we'll have multiple accounts across multiple identities across multiple "Content Delivery Devices." (that we used to call consoles.

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How many Online Identities do we need to have for Christ's sake? Why are those Identities all handled differently by different Companies? Why am I bombarded by ever-changing and unreadable Terms & Conditions every time I want to play
Tomb Raider 16: Lara's Revenge? Why would I need to have 40 different mutually-exclusive Friends Lists across all the Publishers?
3. Tertiary Concern: Streaming "Software as a Service" forces me to continually pay for a subscription; irrespective of whether I choose to play, or not. Unlike MMORPGs that usually have low Subscription costs (Usually £9-£12 per month) Publishers will almost-certainly want a big chunk of money. The tenner a month for an MMO equates to only one "Retail" game every 3 or 4 months. Publishers won't want such low revenue, so I'd be expecting at least £50 a month rates; with heavily restricted lower tier rates to appease Consumer Watchdogs. So your Tenner a month sub will buy you a whopping 1gb per month bandwidth. Yes, really useful. It's not as if fully-installed games are 10-15gb in size already.
As these are concerns rather than anything actually tangible I'm not really trying to make proper complete sense. It's just a case of having a niggle in the back of my brain.
Freestyler: A customer that's too hard to please, complains all the time and wants everything for next to nothing.