Depressing Thoughts

I was out double vodka'ing with Sarah last night and thoughts turned briefly to living arrangements and the future. Are people of our generation in London going to forced to house share when we hit our late 30s and beyond? It's highly unlikely we'll be able to afford our own place in a decent area (although who knows what I'll end up doing after Japan), so should we compromise and move somewhere shit, or are we being forced to settle down and pick a partner to buy with?