Such a picture can be seen more and more often now, it's not just 7 "lucky" blocks in a row. Now a gap between blocks is ~8 mins, in the future it will be less and less. At some point we can face a 1 min gap, this will lead to a very high orphaned blocks rate and the Bitcoin network will become fragmented*.
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* - "fragmented" means that clients will be spending a lot of resources to resolve race conditions.
Nah...the increase is already extremely high. It needs a lot of new miners or upgrades being added every week just to keep it at this level.
But I do think the growth will continue at this level for a while.